Quadris
Quadris is a puzzle game! Place blocks on a grid, get points if they form 2×2, 2×3 or 3×3 rectangles. The game includes single player and multiplayer modes.
Making a 2×2 block in Quadris
Quadris is a clone of Katharine Berry’s Bitris, which is in turn an adaption of Tringo from Second Life. It was written using BlitzMax in 2010.
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Quadris for OS X Doesn’t currently run on latest OS.