Halo 5: Guardians achievements

Simultaneously killed two Wardens in The Breaking on Heroic difficulty.

Knocked two Hunters into the ocean during the Battle of Sunaion.

Completed The Breaking on Legendary difficulty without the entire fireteam dying.

Simultaneously destroyed 2 cores in Guardians on Heroic difficulty.

Completed Swords of Sanghelios co-op with both Mantises on Heroic difficulty.

Destroyed the Phantom at the Covenant camp in Reunion on Heroic difficulty.

Teamed up in a vehicle to kill 30 enemies in Unconfirmed co-op.

Helped the Elite General charge the hill in Osiris on Heroic difficulty.

Simultaneously assassinated two Elites in Blue Team co-op.

Kept 6 miners alive at the elevator in Evacuation on Heroic difficulty.

Operated four different vehicles at once in Mission 13 on Heroic difficulty.

Finished Evacuation within 18:00 without dying on Heroic difficulty.