The Weighted Companion Cube is your only friend throughout the Portal universe. You only know the poor thing for only a short period of time in a single test chamber. At the end of the test chamber, GLaDOS says the Weighted Companion Cube must be euthanized. You must drop your friend into a pit of fire.
|Gordon Freeman, Alyx Vance, Barney Calhoun, Eli Vance, Dog, Wallace Breen, Combine, Isaac Kleiner, Judith Mossman, G-Man, Father Grigori, Combine Zombie, Stalker, Resistance, Turret|
|Chell, GLaDOS, Weighted Companion Cube, Turret|
|Heavy, Pyro, Scout, Medic, Engineer, Sniper, Spy, Demoman, Soldier|