Invincible Marine on Outskirts

An Invincible Marine can be seen on the level Outskirts on Halo 2.

Play the level Outskirts on Legendary difficulty, and there is a marine that can become invincible. This can only happen when you are driving through the tunnel in a Warthog and you have a marine on the rear gun. When you get to the area where the Covenant have positioned troops and ammo crates in the tunnel, see if you can get any enemy to shoot at him with Needlers. From then on, he cannot be killed. If he is shot with anything beforehand, then he will die.