Aliens: Colonial Marines is a squad-based first-person shooter in which the player controls four Colonial Marines, each with a different personality and primary weapon. Each player character can carry additional weapons including a flamethrower, pulse rifle, smartgun, pistol, RPG, and many types of grenades. The player controls one marine at a time, issues orders to the others using context-sensitive commands, and may switch between characters at any time.
Please note that this is not part of the game, but a E3 Demo that showed us a specially made part of the game for promotional reasons. (bait & switch)
And so it became that aliens learned to play "patty-cake"
This is not in the game!