Alien Breed

The alarm in this level is triggered by running into the walls. The entire level is dark but there are red lights along the walls to help guide you. You can also use weapons fire to help figure out where the walls are in the darker areas. Just stay away from the lights and work your way to the exit.

If you're boosting this trophy by yourself with two controllers stock up on extra lives and back up your save first. You can leapfrog the players past one another and completely ignore the enemies.