Bombing Run Achievement in Halo: The Master Chief Collection

In this gametype, two teams will face off in an attempt to arm a bomb in the opponent’s base. Typically, there are three variants: Single Bomb, Multi Bomb, and Neutral Bomb. In order to carry out this achievement, players will have to pick up the bomb located at their base or on the map right from the start of the match, carry it to the opponent’s base without every dropping it or dying, arm the bomb, and wait until the countdown expires before the bomb explodes.

Keep in mind that this achievement can be boosted in a Custom Game. Simply start an Assault match on a small map such as Shrine or Warlord with another player or second controller. When the game begins, pick up the bomb at your base and proceed to plant it at the enemy base. Once the bomb explodes, the achievement will unlock so long as you did not drop the bomb nor die by your partner.