Reach level 25.

Kill 3 enemies with a single round.

Kill 5 Infected in a row with a single blow.

Kill a Suicider with a grenade.

Complete 5 quests in a single co-op game with the same partners.

Breach a locked door with the first blow.

Sever 100 limbs.

Travel a distance of 20 kilometers on foot.

Create a customized weapon.

In Buried, access all areas with the help of your new friend in one game.

Complete Arcade Mode with Cole

Complete a Combo Tutorial