3D Tetris is free, but you are encouraged to make a donation to keep the projects active and provide resources for new initiatives:
If you choose not to donate, that is fine. Enjoy:
If it complains about not finding glut32.dll, you need to download the following file as well. Extract the dll from the zip file and place it in the same directory as where you downloaded 3D Tetris.exe:
Just for fun, you may want to play the traditional tetris music while you're playing the game to increase the fun :P
Download Tetris Music (Midi Format)
I would love to see a line of encouragement from you in my guestbook too.