QuadrOs is Tetris&Pentix clone, with multiplayer ability and many customizable options, works on Linux & Windows
Quadros is good! Thanks.
So far, I've only tried QuadrOs for a few seconds to see if it had the features I wanted. It did. It's a Tetris clone that works on both Linux and Windows and supports splitscreen two-player head-to-head mode. (This means two people can sit down at the same computer simultaneously and compete with each other.) osdm, thank you for writing this and releasing it as open source.