The GEP (Guided Explosive Projectile) Gun is a rocket launcher in the 2000 video game Deus Ex. It has homing rocket capabilities, breaks down any door that is breakable, and is very useful against robots in the game. The GEP Gun is the best weapon in the entire game.
Noob: Hey man, I got stuck in Deus Ex because these guys keep killing me.
Player: You should try the GEP Gun takedown.