In the Main Campaign, completed Lighthouse.

Kill 50 Helghast soldiers without dying

Get 10 headshots with the STA-52 SLAR Sniper Rifle

Complete Chapter 2

Kill 2 Helghast with 1 Double Shot from the M13 Semi-Automatic Shotgun

Complete Chapter 1

Finish a level above 75% hit efficiency

Destroy 2 Helghast Tanks attacking the Industrial level

Unlock the Cooper Safe in Episode 1.

Unlock your first change of clothing.

Stealth kill 15 enemies without alerting anyone.

Collect your first hidden Sly mask.

Destroy a helicopter during the apocalypse with a vehicle