Euclidean Crisis is a multiplayer real-time strategy game played using a touchscreen stylus and voice commands. The game can also be played with a mouse.

Players control a diverse team of units on a two-dimensional battlefield, and must destroy their opponents' energy cores while protecting their own. Players tell units where to go by drawing out paths, and give orders using special gestures and voice activated commands. The game is rendered in a retro aesthetic featuring simple shapes (hence the origin of the title) in a world with colorful, psychedelic visual effects synced to the music.