Cabal/Level 1

Stage 1
You start with defences on the side. Targets include the two white buildings in the middle, and the bushes you can shoot for powerups.

No special tactic required for this stage.

Stage 2
There are more buildings within this level that need to be taken out, including the blue cover.

Stage 3
There are buildings in front, as well as a tower behind the fence that can be destroyed. Also, there is a gate labeled "Keep out" that provides cover to two grenadiers who will attack at a distance.

You will also see a grenadier in a different coloured uniform. Shoot him, and once he falls down, he can be attacked to collect a few more grenades. Some medical officers may sometimes rush in from the side. While they can't be killed, you can continue attacking them (or throw a grenade at them) to harvest plenty of grenades.

A helicopter will also appear on this mission. It is destroyed by weapon fire, or by a single grenade.

Stage 4
Destroyable objects include the two planes within the airstrip.

Boss
The boss is a helicopter that will fire bombs towards you. These bombs can be shot down, although you may find it easier to shoot the plane directly to take out these bombs.

Within the volleys of bombs, there are gaps, which should be run to when possible. If you can't, try dodging by standing between the bombs, or by attempting a roll at the last minute.