A very unique computer game developed by GMA Games. Shades of Doom is probably one of the only games I'd recommend playing with your computer monitor switched off. Game play is based completely off sounds and verbal feed back from the game.
The premise of the game is that you are exploring a research base in which a flawed experiment has gone very wrong, turning the base's inhabitants into mutant monsters. You must find various data wafers and shut down the experiment using these data wafers. Each type of monster, as well as most other objects, make a distinct sound so you can identify them, although you can get spoken feed back as well. All in all a challenging, if ambitious, game. Its actually quite addictive. You can learn more at http://www.gmagames.com.