Go to the true ending

PLAYER 2: Throw away Player 1's head 10 times.

Shoot the helicopter pilot with a Magnum at point-blank range.

Return to the game as a human character.

Destroy all enemy ground targets and kill no allies with the rods.

Clear Mission 9.

Complete all the trials

Resuscitate your partner in coop 10 times

Finish all levels in Knight difficulty

Complete any multiplayer level.

Kill 5 Phantoms in one game in Nightfall in Regular or Hardcore difficulty.

Rescue all of the captive souls.

[NETWORK RANKED MATCH] Win 3 games in a row.