The Majestic Map Pack Add-on for Halo 4 has 10 achievements worth 250 gamerscore.
In Majestic DLC matchmaking, assassinate an enemy who's in zoom mode.
In Majestic DLC matchmaking, perform 5 'airsassinations.'
In Majestic DLC matchmaking, get the 'Close Call' medal twice during one match.
In Majestic DLC matchmaking, kill 5 enemies while Promethean Vision is active.
In Majestic DLC matchmaking, kill 5 enemies while Active Camo is active.
In Majestic DLC matchmaking, get a Double Kill or higher with one Pulse Grenade.
In Majestic DLC matchmaking, get 4 kills using the SAW without dying.
In Majestic DLC matchmaking, kill 3 enemies while they are using Jet Packs.
In Majestic DLC matchmaking, call in 3 ordnance drops during the same game.
In Majestic DLC matchmaking, perform a melee kill right after using Thrust Pack.