Kleiner's Adventures Mod for Half-Life Teaser Trailer #1 video

A mod where you play as Kleiner. A scientist from Black Mesa that survived the resonance cascade. He is still finding work everywhere and he found a new research facility that is supposbly better and more secure. You, Kleiner go into one of your normal days of work and the guy in the main lobby tells you this unknown species of aliens have invaded us. But not to worry, the military has it under control