The biggest installment of the award winning Sentinel sci-fi tower defense series now on PC!

Take the fight to the alien homeworld and unleash a massive arsenal of weaponry. Get up close and personal on the battlefield in your power armor to execute devastating attacks and support your defenses!

* An epic campaign across 20 levels.

* A powerful commander unit which can level up and gain new abilities as you play.

* Over 20 unlockable turrets, orbital ship weapons, automated drones and abilities at your disposal.

* Customize your weapon loadout in the Armory to match the demands of the mission.

* NEW: Includes new content featuring new commander, enemies, campaign, weapons and more!

* Endless modes for all maps.

* NEW: Steam Achievements

* Classic mode allows you to compete for scores in a pure skill-based game mode.

* Exclusive music by Specimen A.