Choose to save Fergus

Unlock stealth perk 1

Finish the campaign in any difficulty

Single Player: Kill 25 enemies while supercharged

Single Player: Rip off and use all alien weapon types

Complete Safeties Off

Single Player: Kill 25 enemies using only the Nanosuit's enhanced powers instead of guns

Single Player: Save a Nanosuit module package

Finish The Raft

Finish Baxter Building

Get to the end.

Break the code.

Find an Anti-Cube.