Okay, first there are a few problems. This program screams "run me in fullscreen mode", so you better do as you're told. Secondly, you may get an error about NTVDM. You can ignore it, but if you know what's causing the problem, just let me know.

Tetris - 2 Player Versus:

Version 0.9 (Source)
Version 0.9 (Binary + Source)

For the moment, only the executable (single player) is available for download. Until I can correct the serious errors in the new version, this will have to do. There is music, but it cannot be processed properly by Windows XP due to some emulation problems with their DOS Box. I suggest using a program such as VDM Sound in order to solve your problem. Everything else works just fine.

Tetris - Single Player

I haven't even started this yet. Until I finish the ASCII version and implement it completely in Allegro, this will not be made available.