Alizarin Tetris is a Tetris-like game with a twist for Unix, Win32 and BeOS systems. It includes multi-player support, user-extensible color, shape and sound styles, can use TCP/IP networking and features a few different AI opponents. It was written using the SDL Library.

License: free

Additional System Requirements:

• FreeType library, version 1.3.1 or later (but not version 2)
• SDL library, version 1.1.6 or later
• SDL_ttf library (which requires FreeType), version 1.2.2 or later