There are eight secret achievements in Borderlands for the Xbox 360.
Check out my other guide if you’re looking for the full list of Borderlands achievements.
12 Days of Pandora (30 points) – Master the technology of Pandora
Destroyed the Destroyer (50 points) – Kill the Vault boss
Destroyed the Hive (40 points) – Kill the Rakk Hive
United We Stand (35 points) – Defeat the Rakk Hive, the Vault Boss, Sledge, Krom, or Flynt in a co-op game
Wanted: Flynt (30 points) – Kill Flynt
Wanted: Krom (20 points) – Kill Krom
Wanted: Sledge (10 points) – Kill Sledge
You’re on a Boat! (15 points) – I bet you never thought you’d be here