Rating: 5/5
Doom needs no introduction. It's the game that pioneered the FPS genre of video games, and it was a huge success all over the world. The game has next to no story; you're a space marine, and you have to kill the invading hordes of demons before they kill you. The levels range from demon infested military bases on Phobos and Deimos, the two moons of Mars, to the deepest depths of Hell.
You also need an emulator to run this game. To grab one quickly, please check out our DOS emulators section.