Defeated the Rakk Hive, the Vault Boss, Sledge, Krom, or Flynt in a co-op game

Discovered Sledge's Safe House

Rescued a groupmate from death in a co-op game

Killed an enemy plumber-style

Earned level 5

Completed 5 missions in the Arid Badlands

Get one kill with car, tank and plane

Defend five flags

Win once on every map as any team

Acquired all trophies.

Held every weapon and accessory.

Melee kill one enemy player