Earn 5 or more Stars on a song in Career or Quickplay

Fill your Rock Meter all the way

You flew under all the main bridges in the game.

Make 20 enemies hop around by shooting them in the foot.

Earn the Army Distinguished Service Medal

Killed 300 creatures

Clear 50 dungeons

Completed "Following in His Footsteps"

Reach level 4 in any class

Play Combat Mission

Singleplayer: In First In, Kill the Hostage Taker with a Head Shot

Save 5 people besieged by zombies.

Complete act I.