Level up to Rank 5

Complete a mission (excluding New Blood) with a human partner

Perform 50 Hat Shots

Make your first kill as a rookie (in Cause and Effect mission)

Complete the game on any difficulty level

Co-op snipe 5 enemies

Complete Chapter 4 on any difficulty level

Kill 100 enemies with a sniper rifle

Complete half the game on hardest difficulty

Heal your partner 10 times

Complete Chapter 1 on any difficulty level

5 Starred on Easy (or 3 Starred on a higher difficulty) 25 Rock Band 3 songs.

Complete the campaign on any difficulty.