To some gamers riding up and down in an elevator is not the idea behind a first person shooter (FPS) game, but check out the video for this Elevator: Source mod from Pixeltail Games and you will soon become addicted to what is going around you.
Basically you are trapped the elevator with a group of crazies, its multi player so there is not much that can be done about that! You then travel up and down twenty eight floors all of which have a random theme.
This is what you can expect from the Elevator: Source download;
Up to 28 randomized floors to stop on (with DLC packs possible in the future!)
A thrilling co-op experience
Realistic elevator physics
Cunning, state of the art AI that REALLY GOES INTO THE ELEVATOR AND WAITS!
Real moral choices! What floor do you get off at? Do you ever get off? Only you are able to craft your elevator story.
Source [Nerd Approved]