The classic Doom. I can't say much that you probably don't know. Doom is id's masterpiece. It features 3D movement, 9 weapons, several "bad guys," and a 9 levels. The shareware version let's you play the first chapter in the Doom "novel." There are also several "mystery items' that you'll find in the game. They range from medic kits to increase health, to berserk kits, to make you punch a lot harder. Doom will run on and system 386 or greater with Dos 5. If you like computer games, and a little guts don't freak you out, you will love Doom.