S.T.A.C.K.E.R. is a bit of an odd game: a Tetris knockoff masquerading as a S.T.A.L.K.E.R. knockoff. But it’s fairly entertaining. The blocks that drop can be enemies, weapons, armor, or other useful or harmful items. It can seem a bit complicated at first, but it’s really not a bad game once you realize what’s going on.

You can download a copy of S.T.A.C.K.E.R. from tigsource forums here.