Maid Cafe Simulator’s Steam Deck compatibility is currently Unknown, not Verified or Unsupported. The base-game Steam metadata lists Windows and macOS, with no native Linux build, and there was no dependable AppID 3232690 Proton report at the latest check. A Deck owner may test the Windows build through Proton, but successful launch, controls, performance, and save behavior are not yet guaranteed.
Read Unknown correctly
Unknown means Valve has not published a completed compatibility category for this product. It does not mean the game definitely fails, and it does not mean a lightweight-looking café game will automatically work. Treat every result as specific to the tested game build, SteamOS version, Proton version, and Deck model.
Before buying solely for handheld play, check the current Steam store badge and refund rules in your region. Look for recent reports that name AppID 3232690; do not transfer results from Maid Cafe on Electric Street, a Roblox title, or another similarly named game.
Prepare a reversible first launch
Let Steam finish downloading and shader processing, connect power for the first test, and keep enough time within your applicable refund window. If you already play on another computer, wait for Steam Cloud synchronization and create a known backup before loading that save on Deck.
Start with Steam’s default compatibility choice. Avoid changing Proton version, launch options, resolution, and controller template all at once. A default failure gives you a clean baseline; one change at a time shows what actually helped.
Check controls beyond simple movement
The current store metadata does not declare native controller support. Reaching the title screen with Deck controls is therefore not a complete input test. Walk, look around, interact with a customer, use a drink station, operate the register and change interface, navigate the phone or management menus, and save.
If an action has no mapped input, use Steam Input to bind the required keyboard or mouse command, then label the result as a custom layout. On-screen prompts may continue to show keyboard keys. Confirm that touchpad or touchscreen use does not block precise change selection.
Test performance during a real shift
An empty café is not the demanding case. Run a complete service with customers, maids, stations, and any available stage activity. Watch frame pacing while turning the camera across the room and during rush periods. Check whether audio or video scenes remain synchronized.
Use a stable frame cap only after observing the default. Lower in-game graphics options before forcing unusual Proton launch parameters. Record battery behavior separately from playability; a game can run correctly while drawing more power than you prefer.
Game will not launch
Verify files, remove custom launch options, return to the default Proton choice, and retry once.
Controls are incomplete
Map the missing keyboard or mouse action through Steam Input and document the custom layout.
Text is too small
Test UI or resolution settings and the Deck magnifier before accepting the session as playable.
Save differs from PC
Stop play on both devices, compare Cloud timestamps, and protect the newest known-good copy.
Test suspend, resume, and Steam Cloud
Save through the game, return to a safe state, suspend briefly, then resume and finish the current interaction. Quit normally and verify that Steam Cloud completes. On another machine, inspect timestamps before opening the game; do not use cross-device success once as proof that every save transition is safe.
If Cloud conflicts, follow Save Location and Backup before choosing a copy. Steam Cloud is officially listed, but the store does not promise a Deck-specific or Windows-to-SteamOS compatibility result.
Report a useful compatibility result
Include AppID 3232690, test date, game build if visible, Deck model, SteamOS, Proton version, control layout, resolution, frame cap, full-shift result, suspend/resume result, and save result. Say “tested working” only for the configuration you used; do not upgrade the official badge yourself.
Check the official Steam store page for the latest Deck category and platform list. Until Valve or reliable current AppID-specific testing provides a stronger result, the accurate answer is Unknown, no native Linux build listed, testing required.