Reclaimer (level)

Reclaimer is the fifth campaign level of Halo 4. Completing the mission on any difficulty unlocks the Reclaimer achievement. The Mortardom achievement is awarded for hijacking a Wraith and using it to destroy at least four enemy Wraiths in the level on Heroic or harder.

Glitches
The SPARTAN-IV sniper at the beginning of the level may experience a pathfinding glitch that prevents him from boarding the Mammoth. He will run left toward the rock wall and continue to run in place; neither walking into him nor meleeing him has any effect. Restarting the level does not seem to fix the problem, either.