Arkham is not one city but a patchwork of flooded districts, each with its own hazards, loot, and lore. This The Sinking City 2 district guide breaks down every zone you will navigate, from the relative safety of the hospital to the Deep One-infested fish market. Knowing what awaits in each district matters because your skiff fuel, ammunition, and sanity are all finite resources that punish aimless wandering. Get the zone-by-zone breakdown that lets you plan routes before you set out, so you spend less time treading water and more time uncovering the secrets beneath Arkham's tide-stained streets.
District Overview: Mapping Arkham's Flooded Areas
The supernatural flood that swallowed Arkham did not recede evenly, and that unevenness defines how you explore. According to the official Steam store page for The Sinking City 2, the city presents "tide-stained avenues and battered Art Deco" where "districts feel lived-in and water-worn, with routes by foot and skiff, shortcuts behind collapsed seawalls, and secrets tucked in boarded parlors." That description is not flavor text; it is a gameplay promise that each district offers distinct traversal mechanics and reward structures.
Before diving into individual zones, understand the three broad categories of The Sinking City 2 flooded areas you will encounter: tidal basins (fully submerged streets where the Wraith's sonar-based navigation is your only lifeline), partially submerged districts (where ankle-to-waist-deep water slows movement and forces you to balance stealth against the Dagonite patrols' sightlines), and flooded interiors (the submerged basements and flooded subway tunnels that house the rarest loot but demand you manage your oxygen meter and sanity drain simultaneously). This tri-level classification, which the game's map legend color-codes by depth, is essential because it directly dictates whether you need to prioritize the Diving Suit upgrade, the Sonar Beacon, or the Sanity Restorer before tackling any specific quest line in the district guide.
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Shallow-water districts — walkable streets with ankle-to-knee-deep water, few aquatic threats, and the highest density of safe houses. These serve as your early-game hubs.
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Deep-water districts — submerged building floors and flooded basements that require the skiff or swimming. These hold the best loot but demand careful oxygen management.
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Transitional zones — collapsed seawalls, flooded tunnels, and half-sunken plazas that connect districts. These are where ambushes happen because enemies funnel through narrow choke points.
The game's district layout also follows a logical difficulty curve. The zones closest to your starting safe house contain basic scavenging opportunities, while the districts further out—especially those near the harbor—host the more aggressive Deep One populations. Community reports from early previews suggest that the fish market district, which we cover in detail below, represents the first major difficulty spike because it combines tight indoor spaces with amphibious enemies that attack from multiple angles.
For a complete visual reference of every named location, check the comprehensive map guide that pairs with this district breakdown. That guide pinpoints the exact coordinates of all safe houses and hidden areas, which is critical because Arkham's flooded districts recycle similar-looking brownstone facades and submerged street grids—without a coordinate overlay, you'll waste oxygen circling the same collapsed pier while the Dagon cult's patrol routes reset. Cross-referencing the map with this district guide lets you plot a dive path that chains two or three secret locations per excursion before your air reserves force a return to the nearest safe house.
Saint Mary's Hospital District: Your First Safe Haven
The hospital district serves as the game's opening area and your introduction to Arkham's vertical exploration. This is where the story begins, and it is also where you will learn the core loop of investigating, scavenging, and retreating to safety. The district centers on the hospital building itself, which the Steam page describes as "a hospital where science hides its face"—a hint that the building contains more than medical supplies.
Key Landmarks and Loot Density
The hospital district rewards thorough exploration because its multi-story layout hides resources in unexpected places. Patient rooms on upper floors often contain medical supplies, while the basement morgue holds valuable crafting components that other players might miss. The administrative wing, accessible only after finding a keycard, contains a safe with ammunition and a unique document that advances the main investigation.
| Landmark | Threat Level | Loot Value | Notes |
|---|---|---|---|
| Emergency Ward | Low | Medium | Medical supplies, bandages, early weapon parts |
| Morgue & Basement | Medium | High | Crafting components, key items, occasional enemy spawn |
| Administrative Wing | Low | High | Safe with ammo, lore documents, keycard required |
| Rooftop Helipad | High | Medium | Sniper vantage point, requires climbing, enemy ambush risk |
The district also introduces the game's safe house system. Your first safe house, located in a converted staff lounge, provides a storage chest, a workbench for crafting, and a bed that advances time. Community testing indicates that safe houses in The Sinking City 2 function as respawn points and fast-travel anchors, so unlocking them in each district should be your top priority when entering new territory.
Navigating the Flooded Lower Floors
The hospital's lower floors present your first encounter with The Sinking City 2 underwater guide mechanics. After the flood, the basement and ground-floor corridors are partially submerged, requiring you to wade through chest-deep water while managing your stamina. The game introduces a drowning meter that depletes when you submerge completely, and the hospital basement is where you first learn to manage it.
Practical tips for this district: Prioritize the Kraken's Reach harpoon upgrade before descending to the flooded lower floors, as the standard harpoon lacks the range to safely pull debris from the murky depths, often forcing you into the line of sight of lurking Dagon-spawn. Always carry a flare gun to clear the thick, vision-obscuring spore clouds that cluster near stairwells; firing blindly into them risks ambushes from Fish-Men that use the cover to close distance. Finally, mark the safe houses on your map early—the lower floors have no dry ground, and a quick retreat to a safe house is your only reliable way to reset your sanity meter without wasting precious medkits.
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Check every examination room — medical cabinets often hide syringes that restore sanity, a resource more precious than health.
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Use the stairwells, not the elevator — the elevator shaft is flooded and contains a scripted enemy encounter that wastes resources.
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The rooftop access ladder requires a crowbar, which you find in the maintenance closet on the second floor. Grab it early to unlock the sniper perch.
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Listen for dripping water — audio cues indicate hidden wall safes behind loose panels, a pattern that repeats across all districts.
The hospital district is also where you acquire your first firearm, a revolver found in the security office. This weapon is weak against the larger creatures but effective against the Wretches, the dog-like enemies that patrol the flooded corridors. According to player reports from the extended gameplay trailer, the hospital's enemy density is deliberately low to teach combat fundamentals before the fish market throws you into the deep end.
Arkham Fish Market: Deep One Territory
The fish market district is the centerpiece of the extended gameplay trailer released on July 29, 2026, and it represents the game's first major combat gauntlet. The Steam news post describes it as "a former hub of enterprise and trade, now taken over by Deep Ones from the ocean and other creatures," with "seafood stalls, warehouses, and fishing equipment all left forgotten by former owners." The district's transformation from commercial center to monster den makes it one of the most memorable zones in the game.
The District's Unique Threat Profile
Unlike the hospital's sparse enemy placement, the fish market is densely populated with Deep Ones, the amphibious humanoid creatures that serve as the game's primary enemy type. The district's layout—narrow market stalls, interconnected warehouses, and a central plaza—creates ambush opportunities that the enemy AI exploits aggressively. Community reports indicate that Deep Ones in this district use coordinated flanking tactics, with one group drawing your fire while another circles through the stalls.
| Enemy Type | Health | Weakness | Recommended Approach |
|---|---|---|---|
| Deep One Scout | Low | Headshots | Pistol or melee, quick takedown |
| Deep One Brute | High | Fire, explosives | Shotgun at close range, dodge heavy attacks |
| Fish Market Hybrid | Medium | Light, silver weapons | Flanking attacks, use narrow corridors to limit movement |
The district also introduces the Hybrid, a former human transformed by Deep One influence. This enemy type is faster than standard Deep Ones and uses ranged attacks, making it a priority target in any engagement. The trailer shows the "only sane person still living there" who is "barely even human anymore"—this NPC serves as a quest-giver and vendor, but his dialogue hints at the district's darker secrets.
Scavenging Routes and Safe House Placement
The fish market's safe house is located in a former fishmonger's office above the main market hall. Reaching it requires climbing a collapsed staircase and navigating a narrow catwalk, which keeps it relatively secure from ground-level enemy patrols. The safe house contains a workbench and a storage chest, but no bed—you must return to the hospital district to advance time, which reinforces the importance of planning your expeditions.
Optimal scavenging routes follow the district's three main thoroughfares, which connect the primary loot-dense zones without forcing you through the high-level Brine Crocodile spawns near the central canal. Prioritize the northern arterial road first, as it links the collapsed department store (a guaranteed source of crafting materials) to the pharmacy safe house. This path minimizes underwater traversal, letting you conserve oxygen tanks for the deeper flooded areas where the rare relic spawns are located.
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The Market Hall Route — enter through the west entrance, clear the main hall, then work through the individual stalls. This route yields the most crafting materials but exposes you to the highest enemy density.
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The Warehouse Route — approach from the east via the flooded loading docks. The warehouses contain weapon parts and ammunition but require swimming through partially submerged storage areas.
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The Rooftop Route — use the fire escapes to traverse the district above street level. This route is safest but yields fewer resources, making it ideal for supply runs between safe houses.
The fish market also contains one of the game's most valuable hidden areas: a submerged refrigeration unit beneath the main hall. Accessing it requires finding a diving suit in a nearby warehouse, which allows you to explore the flooded lower level. Inside, you will find a unique weapon—a harpoon gun that deals bonus damage to aquatic enemies—along with lore documents that explain the Deep Ones' connection to the flood.
The Docks and Harbor District: Underwater Exploration
The docks and harbor district represents the game's most extensive underwater section, and it is where The Sinking City 2 underwater guide mechanics become essential rather than optional. This district is partially collapsed into the bay, creating a maze of submerged warehouses, sunken ships, and flooded container yards that require systematic exploration.
Diving Mechanics and Oxygen Management
Underwater exploration in this district introduces the oxygen tank mechanic, which limits how long you can stay submerged before returning to the surface. Your base oxygen capacity lasts approximately 90 seconds, but you can extend it by finding oxygen canisters scattered throughout the flooded areas. These canisters refill your meter instantly but are finite resources, so you must plan dive routes that maximize loot per oxygen unit.
| Dive Site | Depth | Oxygen Required | Key Loot | Risk Level |
|---|---|---|---|---|
| Sunken Cargo Ship | 15m | 60 seconds | Weapon parts, unique documents | High (enemy spawns) |
| Flooded Warehouse Row | 8m | 40 seconds | Ammo, crafting materials | Medium |
| Container Yard | 5m | 30 seconds | Medical supplies, salvage | Low |
| Harbor Master's Office | 10m | 50 seconds | Safe combination, lore items | Medium |
The harbor district also introduces pressure hazards that damage you if you descend too deep without proper equipment. The reinforced diving suit, found in a locked locker at the harbor master's office, reduces pressure damage by 50% and increases oxygen capacity by 30 seconds. According to community testing, this suit is essential for exploring the sunken cargo ship, which contains some of the game's best early-game weapon upgrades.
The Sunken Ship: A Vertical Loot Dungeon
The sunken cargo ship is the district's centerpiece location, a multi-level dungeon that requires careful oxygen management and combat planning. The ship's interior is pitch-black, requiring you to use a diving flashlight that consumes battery power. The flashlight battery lasts 120 seconds, and you will find spare batteries scattered throughout the ship, but running out of light in the lower decks is a death sentence.
Starting at the bow, you’ll descend through three distinct deck layers—cargo hold, crew quarters, and the captain’s bridge—each gated by a mandatory puzzle that forces a top-to-bottom clear rather than a free-roam scavenge. This linearity is deliberate: the ship is the only flooded area where the water level rises with you, locking lower compartments behind a timed floodgate mechanic that resets if you backtrack. For the The Sinking City 2 district guide, that means looting efficiency hinges on grabbing the Diver’s Cache key from the purser’s office on deck two before triggering the bridge sequence, or you’ll face a second swim through the now-flooded galley to retrieve it. Plan your inventory slots accordingly—the hold’s Sanity Shrine and two Type-3 Artifact spawns are the real prize, but they’re only accessible once the final waterlock drains.
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The Main Deck — accessible from the surface, contains the ship's wheel and a locked safe that requires a combination found in the harbor master's office.
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The Cargo Hold — partially flooded, contains weapon parts and ammunition crates. Watch for Deep One ambushes that trigger when you open certain containers.
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The Engine Room — fully submerged, requires the reinforced diving suit. Contains a unique shotgun modification and the ship's log, which reveals the vessel's connection to the flood.
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The Captain's Quarters — the deepest point, guarded by a Brute enemy. Contains a unique melee weapon and a key item for the main story.
The harbor district's safe house is located in a former customs office, accessible after you clear the flooded entrance. This safe house includes a drying rack that restores your equipment durability, a feature unique to this district. The drying rack is essential for maintaining your weapons, as saltwater exposure degrades equipment faster than freshwater.
Residential Districts: Hidden Areas and Secret Locations
The residential districts of Arkham—comprising the boarding houses, apartment blocks, and row houses that surround the commercial zones—offer a different exploration experience. These areas are less combat-focused and more investigation-oriented, rewarding players who search thoroughly for The Sinking City 2 hidden areas and secret locations.
Boarded Parlors and Hidden Rooms
The Steam page's mention of "secrets tucked in boarded parlors" is a direct reference to the residential districts' signature mechanic: sealed rooms that require specific tools to access. These rooms are marked by wooden boards nailed across doorways, and opening them requires either a crowbar (for simple boards) or a saw (for reinforced boards). The saw is a late-game tool, so some rooms remain inaccessible until you progress further in the story.
| Sealed Room Type | Tool Required | Typical Contents | Location Examples |
|---|---|---|---|
| Boarded Parlor | Crowbar | Lore documents, small loot | Row houses, ground floors |
| Reinforced Door | Saw | Weapon upgrades, unique items | Apartment basements |
| Hidden Basement | Key + Crowbar | Safe houses, rare crafting materials | Corner buildings, alley entrances |
| Secret Attic | Ladder + Crowbar | Sniper rifles, unique clothing | Taller buildings, fire escapes |
The residential districts also contain the game's investigation sites, marked by glowing yellow indicators on your map. These sites require you to use your detective vision to find clues, reconstruct events, and unlock new story paths. The investigation mechanic is more involved than simple scavenging—you must examine multiple clues in the correct order to trigger the full reconstruction sequence.
The Boarding House Hub
One residential building serves as a recurring hub throughout the game: the Miskatonic Boarding House, a three-story structure that contains multiple safe rooms, NPC quest-givers, and a persistent vendor. The boarding house is unique because it is not a single safe house but a collection of rooms that you unlock progressively:
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Room 101 — your initial safe room, contains a workbench and storage chest.
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Room 204 — unlocked after completing a side quest, contains a chemistry station for crafting advanced consumables.
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Room 305 — unlocked late-game, contains a weapon maintenance bench that repairs durability for free.
The boarding house also connects to a hidden basement that is not marked on your map. Finding it requires noticing a loose floorboard in the hallway outside Room 204, which leads to a crawlspace and eventually a flooded tunnel that connects to the harbor district. This secret passage is one of the game's best-kept secrets, allowing you to bypass the dangerous surface route between districts.
Secret Locations and Their Rewards
Beyond the sealed rooms, the residential districts hide several secret locations that reward thorough exploration. Community reports have identified the following: the flooded basements of the Marlowe Heights row houses, for instance, contain a submerged safe house that respawns a unique bolt-action rifle and a stash of medical supplies after each district-wide tide cycle. Unlike the surface-level loot, these underwater caches require a fully upgraded diving suit to reach, as the oxygen depletion rate in these corridors is roughly 30% faster than in open water, making a hasty return to the surface a fatal miscalculation without proper preparation.
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The Speakeasy — a hidden bar behind a bookshelf in a boarded parlor, accessible only after finding a password note in a nearby apartment. Contains unique consumables and a vendor who sells rare ammunition.
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The Rooftop Garden — accessible via a fire escape behind the boarding house, contains a greenhouse that grows crafting ingredients over time, providing a renewable resource.
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The Flooded Chapel — a submerged church basement that requires the diving suit, contains a unique blessed weapon that deals bonus damage to supernatural enemies.
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The Artist's Studio — a hidden room above a row house, contains a series of paintings that reveal the game's backstory and provide a bonus to your sanity recovery rate.
These hidden areas are not required for story progression, but they provide significant advantages. The blessed weapon from the flooded chapel, for example, is one of the best anti-Deep One tools in the game, and the rooftop garden's renewable ingredients save you from scavenging for consumables.
Safe Houses and Fast Travel Strategy
Safe houses are the backbone of your exploration strategy in The Sinking City 2, and understanding their mechanics is essential for efficient district navigation. Each district contains at least one safe house, but their facilities vary, and knowing which ones to prioritize can save you significant time and resources.
Safe House Facilities Comparison
| Safe House | Workbench | Storage | Bed | Unique Facility | District |
|---|---|---|---|---|---|
| Hospital Staff Lounge | Yes | Yes | Yes | Medical Station (heals sanity) | Saint Mary's |
| Fishmonger's Office | Yes | Yes | No | Drying Rack (repairs gear) | Fish Market |
| Customs Office | Yes | Yes | Yes | Drying Rack + Ammo Press | Harbor |
| Boarding House Room 101 | Yes | Yes | Yes | Chemistry Station (Room 204) | Residential |
| Miskatonic Library | Yes | Yes | Yes | Research Desk (unlocks lore) | University |
The bed mechanic is critical because it advances time, which affects enemy patrol patterns and respawn rates. Sleeping in a safe house resets enemy positions but also advances the game's day/night cycle. Nighttime exploration is riskier—enemies deal more damage and are more aggressive—but some hidden areas are only accessible at night, creating a risk-reward decision for players who want to find everything.
Fast Travel and Route Planning
Fast travel in The Sinking City 2 is not instant; it requires you to reach a travel point (marked by a glowing lantern) and pay a ferryman to transport you between districts. The ferryman charges resources—either ammunition or crafting materials—so fast travel is not free. Community testing indicates the cost scales with distance, making short hops between adjacent districts cheaper than cross-city journeys.
Optimal route planning in Oakmont follows three core principles: prioritize dry-land corridors between flooded zones, chain quest objectives within a single district before fast-traveling out, and always stock up on ammunition and medkits at the nearest safe house before venturing into the drowned industrial sectors. For instance, when moving from the French Hill safe house to the flooded docks, you should clear the Scalphunter hideout en route, then use the fast-travel point at the police station to return, saving roughly 15 minutes of backtracking through waist-deep water where Dagon cultists ambush you.
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Unlock safe houses first — every new district should start with a safe house unlock, giving you a respawn point and storage access.
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Use the skiff for adjacent districts — the skiff is free but slow, and it exposes you to aquatic enemies. Use it only for short trips between nearby districts.
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Save fast travel for emergencies — when you are overloaded with loot or low on health, the ferryman's cost is worth it. Otherwise, walk or skiff to conserve resources.
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Plan scavenging loops — each district has a natural loop that starts and ends at the safe house, allowing you to clear the district without backtracking.
The safe house system also ties into the game's storage mechanics. Your inventory is limited, but safe house storage is unlimited, so you should deposit valuable materials regularly. The weapons guide covers which items are worth storing versus selling, but the general rule is to keep crafting materials and unique items while selling common loot.
District Progression and Difficulty Scaling
Understanding how district difficulty scales helps you plan your exploration order and avoid venturing into zones where you are under-equipped. The game does not lock districts behind story progression, but the enemy difficulty and loot quality scale with distance from your starting point.
Recommended Exploration Order
| Order | District | Recommended Loadout | Key Rewards |
|---|---|---|---|
| 1 | Saint Mary's Hospital | Starting gear | First firearm, safe house, crafting basics |
| 2 | Residential Districts | Revolver + melee | Boarding house hub, hidden rooms, vendor access |
| 3 | Fish Market | Shotgun + medkits | Harpoon gun, Deep One lore, second safe house |
| 4 | Harbor & Docks | Diving suit + harpoon | Sunken ship loot, reinforced diving suit |
| 5 | University District | Advanced weapons | Research desk, unique documents, endgame gear |
The University district, which we have not covered in detail, is the game's late-game zone. It contains the Miskatonic Library safe house, which includes a research desk that unlocks lore entries and provides passive bonuses. The district's enemies are the most dangerous in the game, including Elder Things that require specialized weapons to defeat.
Difficulty Spikes and Preparation
Community reports identify three major difficulty spikes in the game, each tied to a district transition: the flooded commercial zone leading into the Old Wharf, the collapsed subway tunnel connecting the Industrial Docks to the residential sector, and the submerged hospital basement that serves as the gateway to the city's hidden areas. Each spike stems from a distinct environmental hazard—the commercial zone forces players to navigate narrow, debris-choked corridors while managing oxygen reserves, whereas the subway tunnel introduces aggressive Deep Ones that ambush from ceiling vents, requiring the flare gun to be equipped before entry. The hospital basement spike is the most punishing, as it combines limited visibility with a scripted chase sequence that demands precise use of the diving suit's boost mechanic; failing to stockpile at least two medkits and a full oxygen tank before descending almost guarantees a reload. These transitions are deliberately placed to test whether you have adapted to the district-specific mechanics introduced in the preceding area, making preparation—not just combat skill—the deciding factor for survival.
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Hospital to Residential — the transition is gentle, but the residential districts introduce the Hybrid enemy type, which requires new combat tactics.
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Residential to Fish Market — the fish market's enemy density is a significant jump, and players should arrive with at least 20 rounds of ammunition and 3 medkits.
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Fish Market to Harbor — the harbor's underwater sections require the diving suit, and players who skip the fish market's harpoon gun will struggle against aquatic enemies.
The combat guide provides detailed strategies for each enemy type, but the district-level advice is to always carry a melee weapon as a backup. Melee weapons do not consume ammunition, and they are effective against the weaker enemies in every district, preserving your bullets for tougher fights.
Frequently Asked Questions
What is the best district to explore first in The Sinking City 2?
Start with Saint Mary's Hospital because it introduces core mechanics, provides your first firearm, and establishes the safe house system. The hospital's low enemy density lets you learn combat and scavenging without overwhelming pressure, and the safe house there becomes your primary base for early expeditions into adjacent districts.
How do I find all the hidden areas in each district?
Hidden areas typically require specific tools like the crowbar or saw, or they are triggered by investigation mechanics. Search for boarded doors, loose floorboards, and suspicious wall panels, and use your detective vision to highlight interactive objects. Some hidden areas only appear at night, so revisit districts after sleeping to find everything.
Are safe houses shared between districts or separate?
Each safe house has its own storage chest, but the contents are shared across all safe houses. This means you can deposit items at any safe house and retrieve them at another, making it convenient to consolidate resources. However, facilities like the drying rack and chemistry station are unique to specific safe houses.
What is the best weapon for the fish market district?
The harpoon gun, found in the submerged refrigeration unit beneath the fish market, is the best weapon for this district because it deals bonus damage to aquatic enemies. Pair it with a shotgun for close-range encounters with Brutes, and keep a melee weapon as backup for conserving ammunition during extended scavenging runs.
How does the day/night cycle affect district exploration?
Nighttime increases enemy aggression and damage, making combat more dangerous, but some hidden areas and NPCs only appear at night. Plan your exploration to use daytime for combat-heavy districts like the fish market, and save nighttime for investigation-focused areas like the residential districts where stealth is more viable.