Lift up the cover | Composer Halo 4 Guide
Last update: 11 May 2016
At first door you find chest with Holograms. When you open door to the bigger hangar, you'll see a group of scientists running away from enemies. Staying in the corridor, kill visible opponents on right. Inside the construction you find another enemies and a weapon stand.
Go upstairs on a roof. From this place you'll have a good vision. Beware of two snipers on the other side.
Finally, you get to the place, where you have to lift up covers. Ships will drop groups of enemies until you activate a barrier. Before you go outside, kill sniper on the left, on a balcony. Ob the right side you find a cannon - use it to clean the room.
Disassemble cannon and head for a panel at the end of the room, to activate barrier. If enemies attack, you'll defeat them quickly with the cannon.