Mutant flocks are swarming the valley. One shot won't cut it — your emplacement mounts an M2 Skyfire machinegun. Hold the trigger down, ride the recoil, and watch the barrel heat.
The sky is alive: weather shifts between clear, overcast, rain and thunderstorms. Wind drags your tracers. Night brings searchlights and ravens. Shoot falling supply crates for OVERDRIVE.