Also. Dunno if it's intentional or not but defeating an enemy with an airstrike does not unlock them.
Best advice is spam drones and airstrikes, stuff's overpowered. Make sure you have a ghilie on until there's at least 6 left, then roam gas mask and frags.
How would one remap the controls to the arrow keys? Any time I try to change them, it resets to wasd.
