Complete all missions.

Achieve mastery level 10 with the Pistole.

Perform 100 pep signals.

Kill 50 enemies with their own bullets.

Gore 150 enemies.

Enter all Undergrounds.

Kill an enemy within 3 seconds of uncloaking 50 times

Kill 50 enemies using explosives.

Achieved Cost of Lost Memories ending.

Learned all skills in New Game +.

Achieved Return to the Colony ending.

Achieved Making New Memories ending.

Defeated Raven.