Linux and Steam Deck Setup and Current Status

Short answer

Steam officially lists a Windows build, not native Linux support or a Deck Verified promise. Launch players nevertheless report finishing all endings on Steam Deck. Use the Windows build through Steam's Proton path, create a layout for WASD, space, left/right mouse, mouse movement, and directional QTEs, and keep the game windowed so touchscreen clicks and window-based secrets remain accessible.

When to do it: Configure the layout before starting a serious save and test combat, text entry, and Alt+Enter/window behavior in the opening rooms.

What you need: SteamOS or Linux Steam with Proton, a custom Steam Input layout, virtual keyboard access, and a pointer method capable of both speed and precise clicks.

Missable or risky: Platform setup is not missable, but an unusable control layout can block timed puzzles or fights. Test before crossing an ending or boss branch.

Confirmed details

The main Steam store lists Windows system requirements only. Community success on Deck is useful evidence, but it is not the same as an official native Linux build or compatibility rating.

A player who completed all endings describes the required inputs as WASD movement and QTE directions, spacebar, left/right mouse buttons, mouse movement with occasional speed/precision, and untimed keyboard text entry.

The same report recommends Game Mode with the game set to windowed so the touchscreen can hit keypads and precise targets. Windowed mode is also deliberately required by optional secrets.

This page separates documented requirements from route advice. Names, achievement conditions, platform details, and item counts are checked against the linked Steam records; navigation is cross-checked against recorded gameplay. If an update changes a room, prompt, or trigger, use the verification note below before assuming the save is broken.

Step-by-step solution

Step 1 — Install the Windows release through Steam and begin with the default Proton selection. Change Proton versions only if the game fails to launch or a repeatable regression appears.

Step 2 — Create a Steam Input layout mapping WASD to movement controls, space to an easy face button, left/right mouse to separate triggers, and mouse movement to a trackpad or gyro.

Step 3 — Add convenient access to the Steam virtual keyboard for names, numbers, and passwords; those text prompts have no documented time pressure.

Step 4 — Launch in Game Mode, switch Endacopia to windowed display, and test touchscreen or trackpad clicks on small room targets, the soccer timing line, and a simple fight.

Step 5 — Back up saves from the Proton prefix before ending branches. For app 2684630, the Windows-style save resides inside its compatdata prefix under the steamuser Saved Games/Endacopia path.

Common failures and softlock risks

Do not describe Deck play as officially verified: the store currently advertises Windows only.

A gamepad-only template can miss pointer speed, right-click block, text entry, or directional QTE needs. Map the actual keyboard/mouse grammar.

Switching Proton can create or select a different prefix. Back up the active save before changing compatibility versions.

Recovery rule: stop before crossing another chapter boundary. Confirm the current objective, cycle every usable inventory item, and retry the interaction from a clean room entry. If the trigger still fails, close the game before restoring a known-good save; copying or replacing live save files while the game is open can overwrite the recovery state.

Version and verification

Official platform status was checked on Steam; successful all-ending Deck play, complete input requirements, and the Game Mode/windowed/touchscreen recommendation were checked in a current three-response Steam discussion.

Last verified: July 31, 2026, against the launch PC build, Steam achievement records, linked Steam Community guides, and recorded full-game footage. Endacopia can vary some puzzle clues between runs, so follow the clue in your own save when this page explains a method instead of a fixed answer.