Achieve 100% accuracy in any single player mission

Earn 50,000 GP

Complete Act 1

Kill 30 enemies using your sidearm

Kill 15 enemies with a stealth kill

Kill 20 enemies from a distance of 600m or greater

Complete any single player mission without using med kits, but taking damage

Collect all secrets in Siberian Strike campaign

Complete the third interrogation

Complete "It Takes Two"

Complete the second interrogation

Get the train moving again

Begin the hunt