Halo: Reach has 69 achievements worth 1,700 gamerscore.
Noble 1: Earn a Double Kill from the Grave in multiplayer Matchmaking.
Noble 1: Earn a Double Kill with the shotgun in multiplayer Matchmaking.
Noble 1: Kill a player at long range with the DMR in a matchmade Slayer game.
Noble 1: Collect all of the flags in a matchmade Stockpile game.
Noble 1: Destroy a vehicle using Armor Lock in a matchmade game.
Noble 1: Earn a kill in a matchmade Rocket Race game.