Under Arrest - Switch the camera off in the surveillance room before saving Ethan

Shrink and Punches - Stop Blake from hitting Dupre

Find a secret area of a DOOM II level in single player

Die 100 times

In Campaign, kill an enemy through a wall or obstruction.

Die during the solo introduction

Complete any level of DOOM in single player

Complete "PROLOGUE: AWAKENING" mission.

Extinguish 30 torches

Reunite with Chico or Paz

Won your first Accolade

Change into Swoop

Finish the game with the same partner for the majority of the journey and return to the beginning.