Be Like Marty is an achievement in Halo 3: ODST. It is obtained by finishing an entire round on Firefight without killing an enemy. It is worth 10 Gamerpoints. Its picture is of the Campaign for Nuclear Disarmament's Logo, an organization associated with peace.
This achievement can be obtained simply by using two controllers and leaving yourself in a spawn zone, while you do the work on another controller.
- The name of the achievement is a reference to Martin "Marty" O'Donnell, the musical composer for the original Halo trilogy and Halo 3: ODST. This achievement was confirmed in a comment in the 7/7/09 Bungie Podcast, presumably along with the rest of the leaked list.
- This achievement was created after Marty once got 0 kills online when he was trying on a lag-free social playlist.
- This achievement can not be obtained solo because to complete a round in firefight, all enemies must be killed that spawned during the round, excluding any special enemies, such as snipers or Banshees.