Demon Tides is fully supported for the Steam Deck:
Graphic preset is automatically set for a stable framerate throughout the entire game without the use of dynamic resolution or reliance on frame generation.
The game features full controller support, including displaying correct button glyphs.
The entire game is fully playable and has been tested internally on the Steam Deck.
Additional systems like text input and screenshotting are fully integrated into the Steam OS.
Text always remains legible on the handheld display.
No use of secondary launchers and runs on all recent proton layers.