Killed 25 enemies with explosive weapons

Killed 15 enemies with the Hunter's action skill

Earned level 5

Completed 5 missions in the Arid Badlands

Inflict 100,000 damage to enemies.

Achieve Rank 5.

Kill 100 enemies while aiming.

Finish one match of any Versus mode.

Complete the Basic Training.

Kill 3 enemies in a row with your knife in the single player campaign.

Kill 20 enemies with explosives in a single level.

Kill 2 enemies by blowing up a car in the single player campaign.