Crossplay

Is FPS Chess crossplay?

FPS Chess is only released on one platform, so there is nothing to cross-play with.

Steam's own store page lists cross-platform multiplayer for FPS Chess. That confirms it exists, but not which platforms pair up.

Play an ordinary game of chess against a friend or a stranger. However, all your intricate strategies will crumble before the enemy rook's sniper trick-shot. All your practiced openings and counters will amount to nothing before the enemy queen's randomly sprayed machine gun. You finally checkmate the king. Unfortunately, it seems you are not ready for this fight. 5 seconds in and you've been sliced in half by the king's sword. It turns out you are not playing Chess at all, but an FPS. Just make sure to practice your aim!