Halo: Combat Evolved
This is a small tool which allows you to play Halo 2 Vista in 3rd person view. Its a beta and its buggy but it does work quite well. You will need the .Net Framework installed to run this tool.
My first containment mod. This one has almost every weapon modded, warthogs fly, warthog horn shoots wraith mortars, you can walk up buildings (wall walking) and jump to the ceiling of the map by pressing A!!!