A paid mod for Portal 2. A very well finished, good looking mod. In Aperture Tag the test subject uses not portals but a paint gun to solve puzzles.
just great
Co ooooo ooo ooooooooo oooooo oooooooooo ool gaaaaa aaaaaaaaaaaaaa aaaa aaaaaaaaaa aaaaaaaaam eeeeeeeee eeeee eeeeeeeeeee eeee eeee eeeee ee ee eee ee!
COOL! I love this game. And Music was very cool. And......... Nigel nice *_* But money for it, it wasn`t good(((