Vidmaster Challenge: Déjà Vu

Déjà Vu is an achievement in Halo 3: ODST and one of the Vidmaster Challenges. It is unlocked when you complete Coastal Highway on 4-player Legendary Live co-op, with Iron skull activated, and not using the Warthog or Scorpion at all. It is worth 25 Gamerpoints.

Trivia

 * The achievement is named due to its similarity to the previous Vidmaster Challenge achievement Annual, which also requires the Iron Skull and 4 player Legendary live co-op play.