Sniperfight

Sniperfight was a Halo: Reach Firefight gametype. It was featured in the Firefight Arcade playlist. It allowed players to use the Armor Ability of their choice, with a default load-out of a Sniper Rifle and a Magnum. Infinite ammo was enabled.

This gametype, while still usable in custom-game-firefights if saved, no longer exists in the playlists. When 343 Industries consolidated Firefight Limited, Firefight Arcade, and added a multiplayer Score Attack in the Firefight and Firefight Doubles playlists, all differing types of Arcadefight were removed except Arcadefight, and Arcadefight NEP was added.

Tactics
A good tactic is to use the jetpack armor ability to reach good sniping spots.