Non-Xbox controllers require Steam Input. Make sure configuration has D-pad, Accept, Cancel, Bumpers, Left Trigger, Start and Select bound to converse through menus. For Sony and Nintendo controllers, highly recommended to bind Mouse movement and Left Mouse Click, because Left Stick cursor, while is possible, is very unpleasant.

On native build, the game hangs indefinitely and requires force closure. Developers have never addressed the issue. Windows .exe with latest Proton does not have this fault

On Native build, when playing versus Computer, computer's move never is decided, making the single-player hang indefinitely until user quits.

Servers for online rooms, ranking and cloud service are offline. Hosting private friend matches seem possible.

Hotseat

There is a hotseat mode where the same controller or mouse & keyboard are shared one turn at a time between players. Works as intended.

Local Multiplayer

Each offline player needs their own controller; mouse and keyboard are dedicated to one player, so mixed input is not possible.

Steam Remote Play

Each player needs their own controller unless using hotseat mode.

Problems with Mixed Input in Multiplayer

Menu interaction after using mixed input with local multiplayer can cause significant slowdown in the program, requiring forced closure.