The Global Assassin game might best be described as a cross between Doom and Adventure. It's a multiplayer shoot-em-up game set in the first person, and yet it's text-based.

The year is 2035, and robots have taken over the Earth. Most humans died during the invasion or were forced to flee the planet. You are part of a small resistance that has managed to survive underground and is now prepared to strike back.

As a trained assassin, your objective is to return to the Earth's surface, stealthily move through the world's major cities, and systematically rid the planet of its invaders.