Step 1: Load Up Mission Gateway To hell & Kill All Of The Enemies Until You Reach This Point In The Level.

Step 2: Plant a mine or trip mine in front of the smaller box in front of the box i am hiding behind in the video just to be safe.

Step 3: Walk forward abit and then the big door will explode turn around and then run behind the box shown in the video.

Step 4: Throw all 4 of your grenades this will take out all or most of the zombies then immediately start to shoot the elite in the head until he is dead.

Step 5: Rinse & Repeat

Level: Gateway To hell
Difficulty Level: Cadet
Enemy Setup: (For 1 Player)
Weapon: Gewehr 43
Grenades: 4

Worth 10 Gamerscore.