Kill 30 Enemies with the Tau Sniper

Hit 3 Enemies with Fish in the Market

Kill 10 Enemies in a Row, Alternating Hand-to-Hand Combat and Gunfire

Defeat 20 Enemies While Swimming

Kill 4 Enemies with 1 Explosion

Kill 30 Enemies with the SAS-12

Beat 'Chapter 7 - Stay in the Light' in less than 9 minutes 30 seconds

Find the Strange Relic

Activate a Tweak

Throw Back a Grenade and Defeat 2 Enemies at Once

Successfully Counter all of a Brute's Damage-Giving Attacks

Find 40 Treasures