The Sinking City 2 has 6 Inventory Expansion slots (+2 slots each, +12 total) spread across Chapters 2, 3, and 4. They are missable because completed chapters cannot be revisited via Chapter Select. The slots reset to default capacity in New Game Plus, so they only matter to the first playthrough. If you want the full +12 slots, collect all six before finishing each chapter. Plan first-playthrough slot optimisation or commit to NG+ — you cannot do both.

All Six Inventory Expansion Locations

Each Inventory Expansion grants +2 inventory slots, for a maximum of +12 slots across the campaign. Per TheClick.gg, GameRant, NerdSchalk, NoobFeed, Players.com.ua, VG Times, and Frogwares support notes, the six locations are: | # | Chapter | Location | Requirement | |---|---|---|---| | 1 | Ch. 2 (The Wake-Up Call) | Church Graveyard (star-locked crypt) | Star Key + E.R.C. Activator Pen | | 2 | Ch. 2 | Printing House (flooded lower route) | A.P.H. Key + E.R.C. Activator Pen | | 3 | Ch. 3 | Akeley Memorial Hospital Morgue | E.R.C. Activator Pen | | 4 | Ch. 3 | Hospital Gardens (northern gazebo) | None (loose pickup on a table) | | 5 | Ch. 4 (Time and Tide) | Fish Market Guard Post | Leyden Jar | | 6 | Ch. 4 | Jewelry Workshop (side room, NE) | E.R.C. Activator Pen (from Heart of Ice / Frozen Statue puzzle) | The Hospital Gardens expansion (Ch. 3) is the easiest — a loose pickup on a gazebo table. The Jewelry Workshop expansion (Ch. 4) requires solving the Antikythera / Frozen Statue puzzle to obtain the Heart of Ice, which spawns an E.R.C. Activator Pen nearby; use the pen on the Jewelry Workshop crate.

How Emergency Relief Crates Work

Five of the six Inventory Expansion slots are gated by Emergency Relief Crates (E.R.C. Crates), which require an E.R.C. Activator Pen to open. The Pen is consumed on use (single-use), and the Pen usually appears elsewhere in the same chapter or area — backtrack after finding one. A crate may appear before its pen is reachable, so do not assume a crate is permanently locked if the pen is not yet in hand. Tips from the launch-window coverage: - Do not waste a pen on crates that contain only ammo or Dream Essence; save it for one that holds an Inventory Expansion or weapon upgrade. - The Fire Station E.R.C. (Ch. 2) contains only Shotgun Shells + Dream Essence; skip it on your first pass if your pen is limited. - Always search dungeon tables in addition to E.R.C. crates; some expansions sit on ordinary tables (the gazebo pickup in Ch. 3, and the Guard Post table in Ch. 4).

NG+ Reset Behaviour

Inventory Expansion slots reset to default capacity in New Game Plus. Per NerdSchalk's New Game Plus items, lore, and carryover guide, NG+ carries over perk points, perks, and items from the completed save, but story progress resets — and so do any chapter-gated pickups like the Inventory Expansion slots. The slots are therefore only relevant to the first playthrough. Plan your first-run slot optimisation or commit to NG+; you cannot do both.

The No-Chapter-Replay Missable Rule

The Inventory Expansions are missable because completed chapters cannot be freely revisited via Chapter Select. If you skip an expansion in Chapter 2 and finish the chapter, you cannot return to it without starting a new save. The same rule applies to the eight missable optional investigations, the four weapon pickups, the Mushroom Jack broadcasts, and the Emergency Relief Crate keys. The single-playthrough collection route is documented on the [/achievements](/achievements) page.

Sources

[TheClick.gg - The Sinking City 2 Inventory Expansions: All 6 Locations](https://www.theclick.gg/the-sinking-city-2-inventory-expansions) - `media/interview` - checked `2026-09-01` - All 6 Inventory Expansion slot locations with chapter, location, and requirement breakdown; +2 slots per expansion, +12 slots total. [GameRant - Unlock More Inventory Slots As Early as Chapter 2 in The Sinking City 2](https://gamerant.com/sinking-city-2-inventory-slots-locations) - `media/interview` - checked `2026-09-01` - Church Graveyard and Printing House slot locations; missable warning. [NerdSchalk - The Sinking City 2 Inventory Upgrade Guide: Location, Requirements, and How to Get](https://nerdschalk.com/the-sinking-city-2-inventory-upgrade-guide-location-requirements-and-how-to-get) - `media/interview` - checked `2026-09-01` - All 6 Inventory Expansion slot locations with chapter anchor and requirement. [NerdSchalk - The Sinking City 2 New Game Plus items, lore, and carryover guide](https://nerdschalk.com/the-sinking-city-2-new-game-plus-items-lore-and-carryover/) - `media/interview` - checked `2026-09-01` - Inventory Expansion reset behaviour in NG+ (slots reset to default capacity; perk points, perks, items carry over; story progress resets). [Player's Guidebook - The Sinking City 2 Inventory Upgrades and E.R.C. Crates](https://playerguidebook.com/the-sinking-city-2/inventory-upgrades-and-erc-crates) - `wiki/reference` - checked `2026-09-01` - E.R.C. Crate and Activator Pen mechanics cross-reference. [NoobFeed - The Sinking City 2 Printing House E.R.C. Location](https://www.noobfeed.com/articles/the-sinking-city-2-printing-house-erc-location) - `media/interview` - checked `2026-09-01` - Printing House flooded lower route and A.P.H. Key requirement cross-reference.

The Sinking City 2 Getting StartedThe Sinking City 2 getting started path opens with Calvin "Cal" Rafferty arriving on Boat Arkham before stepping into the flooded 1920s city. Spend your first hour learning the inventory and resource loop, the avoidance vs combat trade-off,The Sinking City 2 Achievements and Trophies: Full 23-Trophy List with Missable FlagsThe Sinking City 2 achievements total 23 with 1,000 Gamerscore, per TrueAchievements. The list splits into five unmissable story achievements, four technically missable weapon pickups (Shotgun / SMG / Rifle / Grenade Launcher), eight missable optional-investigation trophies, two single-playthrough collectibles (Mushroom Jack broadcasts and Emergency Relief Crates), one NG+-only collectible (purple-envelope writings), one unlock-all-talents achievement that needs the second playthrough, and the platinum completion trophy.The Sinking City 2 Walkthrough: Chapters, Puzzles, and CodesThis chapter-by-chapter walkthrough of The Sinking City 2 anchors every gated puzzle to its chapter (Devil's Reef, Akeley Memorial Hospital, Redemption Church, Fish Market, Portal Room) and maps each code or sequence to the hint source and the optional-investigation trophy it unlocks. Codes and press orders are sourced from the public walkthroughs listed below; this page does not invent puzzle answers and stays scoped to what those sources publish.The Sinking City 2 New Game Plus: Carryover, Ex Oblivione, Infinite SuppliesThe Sinking City 2 New Game Plus ships at launch with carryover for perk points, perks, and items from a completed save, while story progress restarts in a fresh Arkham run. NG+-only content includes the 8 Ex Oblivione purple documents (with 'The Loss of Calvin Rafferty' and 'The Joys of Discomfort' confirmed), the 5 Infinite Supplies Reference Set entries (infinite Frag Grenades, Handgun, Rifle, Shotgun, and SMG ammo), and the Eldritch Reward unlocks that gate the What Dreams Are Made Of and From Oblivion Read achievements.