The Cannon Battery is a defensive turret found in a small selection of missions. It is like the regular Cannon Tower, except lacking its tower-based mounting. They are often found mounted atop walls.
Cannon Batteries have more health than Cannon Towers, but still lack damage and have slow projectiles.
Their elite counterpart is the Barrage Battery.
| Fortress Destroyer Enemies
Enemies listed in parentheses () following another enemy are the elite form of that enemy. If there is no elite form listed, that means one does not exist or has not yet been added to the game.