BOB

The BOB is a special type of enemy encountered in Halo: Reach. The BOBs take the form of yellow/gold-armored Sangheili Rangers. Killing one of the BOBs will reward the player the "Seek and Destroy" medal. However, the medal can only be viewed on Bungie.net. In the post-game carnage report, the BOB is referred to as a "light Elite vehicle".

The name "BOB" is a reference to Bungie's Marathon video game series. In the series, all of the encountered human characters, besides the player, are known as "BOBs". "BOB" is an acronym for "Born on Board", a reference to the characters having been born onboard the titular colony ship.

Trivia

 * If you try to melee ranger BOB he will vanish from the battlefield and you will have to load a previous checkpoint.
 * Ranger BOB also seems to have a set time limit in order to kill him, if you take your time he will eventually vanish.