This provides access to destroying critical parts of the enemy base.

We'd drop almost to the surface, on the side of the planet opposite the enemy base.

To destroy the enemy bases, the player can only use the machine gun.

The player is then given two choices on how to sneak into the enemy base.

The players can hide in other things near the enemy base and ambush them.

Soon the great ship was streaking toward the enemy base.

He decided to remain at the enemy base till the prisoners were picked up.

The final Mission in both of the first two games is a lengthy approach over the main enemy base.

The player must destroy the enemy bases, then go after the space station itself.

The primary target is usually a major structure like an enemy base or a bridge.