T-Crisis 4 is a free, open-source tetris-style falling-blocks arcade puzzle for Linux.
It features crisp visuals, responsive controls, energetic music, and an
efficient engine inspired by classic handheld tetris gameplay.

Play solo or up to 4 players locally with keyboard, mouse, or USB/Bluetooth
controllers. Includes strong computer A.I. opponents and multiple game modes
in this modern tetris tribute.