The Sinking City 2 Beginner Guide: Investigation, Combat, Upgrades & Survival Tips

Last updated: August 19, 2026

If you're coming to The Sinking City 2 after playing the original, the biggest mistake you can make is assuming the sequel works like the first game.

It doesn't.

The Sinking City 2 shifts the series much more heavily toward survival horror. Combat and exploration are now central, while investigation remains available as an optional system that can reward you with safer routes, supplies and upgrades. Frogwares has also built the game around resource pressure, limited inventory decisions, backtracking and short periods of refuge.

That means your goal isn't simply to investigate everything and collect everything. It's to decide what is worth your ammunition, health, time and inventory space.

This beginner guide explains the systems that matter most during your first hours, including Investigation Space, combat and weak points, safe rooms, upgrades, resources, shortcuts and the biggest mistakes to avoid.

📋 Table of Contents

• The Biggest Change From the First Game
• The Basic Survival Loop
• Investigation Space Explained
• Should You Investigate Everything?
• Combat: Don't Waste Your Ammunition
• Learn to Use Enemy Weak Points
• When You Should Run Instead of Fight
• Safe Rooms and Stashes
• How Upgrades and Talents Help
• Ammo and Resource Management
• Use Shortcuts and Backtracking
• E.R.C. Crates and Activator Pens
• 7 Beginner Rules to Remember
• First-Hour Checklist
• Common Beginner Mistakes
• FAQ
• Related Guides & Sources

The Biggest Change From the First Game

The original The Sinking City was primarily a detective game with horror and combat elements. The Sinking City 2 flips that priority.

Frogwares describes combat and exploration as the main focus, while detective work has been redesigned as an optional system. The official game description reinforces this change: the sequel is built around a resource-lean survival-horror experience, with exploration, puzzles, limited resources, refuge and unlocked shortcuts forming the core loop.

What that means for you: Don't feel obligated to:

• investigate every room immediately;
• fight every monster you encounter;
• spend ammunition just because an enemy appears;
• carry every weapon or resource you find;
• completely clear an area before progressing.

Instead, think about each area as a resource-management problem. Explore → collect what matters → fight when necessary → unlock routes → return to safety → prepare for the next push. That mindset will make the game considerably easier.

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The Basic Survival Loop

The most useful way to understand The Sinking City 2 is to break its gameplay into a repeating loop.

1. Explore – Search rooms, corridors and side areas for ammunition, healing supplies, crafting materials, documents, investigation clues, locked areas, shortcuts, and upgrade-related resources.
2. Decide What Matters – You don't necessarily need to investigate every object. Ask: Does this help me progress, give me a useful reward, reveal a shortcut or provide something I currently need? If not, you can keep moving.
3. Manage Combat – When enemies appear, determine whether you actually need to kill them. Some encounters are unavoidable. Others can be approached differently, avoided or handled with fewer resources.
4. Push Forward – Progress opens additional routes and shortcuts, making previously dangerous areas easier to traverse.
5. Return to Safety – Use refuge areas to reorganize your equipment, craft and prepare for the next section.

The official Steam description specifically emphasizes doubling back through unlocked shortcuts to obtain supplies and upgrades.

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Investigation Space Explained

One of the most important systems for newcomers is Investigation Space. It isn't simply a copy of the investigation mechanics from the original game.

The sequel lets you connect clues and documents to uncover information and optional rewards, while the main progression isn't entirely dependent on completing investigations. Frogwares specifically describes investigation as optional.

An early walkthrough demonstrates how the system works. After finding the Gate Switchboard note, Investigation Space becomes available. The player can connect the note with Gate Fuses and Wires, producing a Talent Point.

The basic process: Find a clue → open Investigation Space → look for related evidence → connect the clues → receive the resulting deduction/reward.

This means you shouldn't simply read documents and immediately forget about them. If the game gives you an investigation-related clue, check whether it connects to something you've already discovered.

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Should You Investigate Everything?

No. And this is one of the biggest differences from the first game.

Frogwares explicitly describes investigations as optional. They can provide safer routes, valuable supplies and upgrades, but they don't necessarily have to be completed to move through the main story.

That creates a useful risk/reward decision.

Investigate when: you're in a relatively safe location; you've already found several related clues; the reward could improve your equipment; the investigation reveals a shortcut; you're short on resources and an optional reward could help.

Move on when: you're already low on health; ammunition is running low; the area is heavily populated with enemies; you're carrying what you need for the current objective; you're spending too much time searching without finding anything useful.

Investigation is a tool, not a checklist. That's probably the most important mindset shift for returning players.

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Combat: Don't Waste Your Ammunition

Ammunition is one of your most important resources. The official description repeatedly emphasizes the game's resource pressure and specifically notes that some encounters require direct confrontation while others are better handled by retreating, rearming and returning better prepared.

So don't adopt this rule: "I see an enemy, therefore I shoot it."

Use this instead: "Do I need to spend ammunition to solve this problem?" If the answer is no, conserving those bullets can make the next encounter much easier.

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Learn to Use Enemy Weak Points

When you do have to fight, aiming at weak points is extremely important. The early walkthrough demonstrates this directly: enemies expose weak points that can be shot to stun them, after which you can use melee attacks to finish them and save ammunition.

So a basic combat sequence is: Spot weak point → shoot it → stun enemy → close distance carefully → melee finish. This can be much more ammunition-efficient than repeatedly firing into an enemy's body.

Beginner mistake: Don't panic-fire when an enemy is rushing you. Instead, watch for the weak point and make your shots count.

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When You Should Run Instead of Fight

Running isn't automatically a failure. It's part of the game's resource-management design. The official description specifically says some encounters may require retreating, rearming and adjusting your build before returning.

That means retreating can be the correct tactical decision.

Consider backing away when: you're almost out of ammunition; you've taken significant damage; several enemies are attacking simultaneously; you don't need to clear the area; you've discovered a shortcut that lets you approach differently.

A fight that costs most of your ammunition may be much worse than temporarily leaving and returning with better preparation.

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Safe Rooms and Stashes

Safe rooms are more than places to take a breather. They function as important preparation points.

A hands-on preview describes safe rooms as places where players can safely craft ammunition and healing items, manage equipment and allocate progression points. It also notes that saving is tied to these refuge locations, although autosaves can occur periodically.

That makes the safe room part of your strategic loop.

Before leaving a safe room: check your ammunition; check your healing supplies; decide which weapons you actually need; craft if necessary; spend available progression resources; consider what you're likely to encounter next. Don't automatically carry everything.

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How Upgrades and Talents Help

Upgrades aren't just about making a number bigger. They can change how efficiently you approach combat.

Frogwares has described the game's talents/perks as ways to support different playstyles, while the official store description also points to investigations that can reward upgrades.

That means a useful upgrade isn't necessarily the one with the biggest-looking damage number. Think about:

• Damage – Useful when you're struggling to finish enemies efficiently.
• Ammunition efficiency – Potentially more valuable than raw damage if you're constantly running dry.
• Survivability – Helpful if you're repeatedly taking damage during close-range encounters.
• Weapon synergy – An upgrade that complements the weapon and combat style you're actually using can be more valuable than a generic improvement.

Build around the way you actually play, not around the upgrade that sounds strongest on paper.

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Ammo and Resource Management

This is where The Sinking City 2 starts behaving much more like traditional survival horror. The official description calls the game resource-lean and explicitly tells players to manage their inventory.

So don't treat every pickup as an invitation to immediately use it.

Keep a resource buffer: If you use all your ammunition during an ordinary encounter, you may arrive at the next major fight with nothing.

Instead: Normal enemy → conserve | Required encounter → spend | Major threat → spend what you need | Safe room → restock/reorganize. That simple approach can prevent a lot of unnecessary difficulty.

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Use Shortcuts and Backtracking to Your Advantage

Backtracking isn't necessarily wasted time. The game is designed around opening routes that make future travel easier. The official description specifically highlights unlocked shortcuts and returning to earlier areas for supplies and upgrades.

So when you encounter a shortcut, ask: "Will this make my next trip through this area safer or faster?" If yes, unlocking it is valuable even if it doesn't immediately advance the story.

Why shortcuts matter: They can reduce enemy exposure; shorten future routes; make resource runs safer; let you return to previously inaccessible supplies; make optional exploration more worthwhile.

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E.R.C. Crates and Activator Pens

E.R.C. crates are another reason not to rush through exploration. A hands-on preview describes Emergency Relief Crates as containing important supplies, while players need E.R.C. Activator Pens to open them.

So if you find a sealed E.R.C. crate: Don't assume you've missed something just because it won't open. You may need to find its corresponding Activator Pen. That makes nearby exploration more meaningful, particularly when you're already in an area where resources are becoming scarce.

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7 Beginner Rules to Remember

If you don't want to memorize the entire guide, remember these seven rules.

1. Don't play it exactly like the first Sinking City – The sequel is much more focused on survival horror, combat and exploration.
2. Don't shoot everything – Ammunition is a resource.
3. Learn weak points early – Weak-point shots can stun enemies and allow more ammunition-efficient melee finishes.
4. Investigation is optional – You don't have to turn every clue into a full investigation. But the rewards can be valuable.
5. Use safe rooms as preparation points – Don't wait until you're completely out of resources before reorganizing.
6. Unlock shortcuts – They make later exploration considerably more manageable.
7. Running away can be the correct move – If you're burning through your last ammunition for an unnecessary fight, retreat and return prepared.

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First-Hour Checklist

If you're starting The Sinking City 2 for the first time, use this as a quick checklist.

During exploration:

• Search obvious supply locations.
• Pick up documents and investigation clues.
• Check locked doors and blocked routes.
• Look for shortcuts.
• Don't waste ammunition unnecessarily.

During investigation:

• Open Investigation Space when it becomes available.
• Connect related clues.
• Look for optional rewards.
• Don't assume every investigation is mandatory.

During combat:

• Look for enemy weak points.
• Shoot weak points rather than panic-firing.
• Use melee when the situation allows.
• Retreat when resources are becoming dangerously low.

At safe rooms:

• Reorganize weapons.
• Check ammunition.
• Craft if necessary.
• Spend available progression resources.
• Prepare for the next area.

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Common Beginner Mistakes

• Using ammunition on every enemy – This is probably the fastest way to make the game harder than it needs to be.
• Ignoring weak points – You're potentially wasting bullets that could have been saved through a stun-and-melee approach.
• Treating every investigation as mandatory – Investigations are optional, although their rewards can be extremely useful.
• Never returning to safe rooms – Your equipment and resources are part of the survival loop. Use the places designed for preparation.
• Refusing to backtrack – Once you've opened a shortcut, returning to an earlier location can be much more efficient than pushing forward under-equipped.
• Hoarding everything – Resources are useful because you eventually use them. Don't be afraid to spend them when the situation justifies it.
• Confusing exploration with completion – You don't have to completely strip every room before moving forward.

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Quick Reference

System	Beginner approach
Combat	Look for weak points and conserve ammunition
Melee	Use after staggering enemies when safe
Investigation	Optional, but useful for rewards and safer routes
Resources	Maintain a reserve rather than spending everything
Safe rooms	Reorganize, craft and prepare
Upgrades	Choose improvements that fit your playstyle
Shortcuts	Unlock them whenever practical
E.R.C. crates	Look for Activator Pens
Backtracking	Use shortcuts to make return trips worthwhile
Retreating	Valid strategy when resources are low

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FAQ

Is The Sinking City 2 harder than the first game?
It is designed around a much stronger survival-horror focus. Combat and exploration are now central to the experience, while investigation has become optional.

Do you have to investigate everything?
No. Investigations are optional and can provide additional routes, supplies and upgrades.

Should I save my ammunition?
Yes. Resource management is an important part of the game's survival-horror design. When possible, use weak points and melee attacks to reduce ammunition consumption.

Should I fight every enemy?
No. Some encounters are better handled by repositioning or retreating, particularly when you're low on resources.

What are safe rooms for?
They provide a place to safely prepare, manage equipment and resources, craft and handle progression. A hands-on preview also describes them as the game's main saving locations, alongside periodic autosaves.

Are shortcuts important?
Yes. The game specifically encourages doubling back through unlocked shortcuts for supplies and upgrades.

What should I do when I find an E.R.C. crate?
Look for its Activator Pen. E.R.C. crates can contain useful supplies, but the crates are sealed until activated.

Is Investigation Space important?
Yes, even though investigation itself is optional. Early gameplay uses Investigation Space to connect related documents and can award a Talent Point.

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Related Guides & Sources

• Apartment 5 Safe Code: 1908 & How to Find the Clue – Quick solution for the first safe puzzle in the game.
• The Sinking City 2 Steam Community – Join the discussion, share tips, and stay updated on the latest community discoveries.
• r/TheSinkingCity on Reddit – Early release discussion, puzzle solutions, and player experiences.

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Final Beginner Tip

The best way to approach The Sinking City 2 isn't to ask: "How do I clear this area?"

Ask: "How do I get through this area while spending as few resources as possible?"

That one change in mindset fits the game's new design. Explore carefully, investigate when the reward is worth the risk, learn enemy weak points, use safe rooms to prepare, unlock shortcuts and don't be afraid to retreat.

The Sinking City 2 is deliberately built around pressure and resource decisions. Once you stop treating every enemy and every clue as something that must be dealt with immediately, the survival-horror loop becomes much easier to understand.

Guide for The Sinking City 2