Space Invasion HD!

Awesome, futuristic line defense game full of strategy and upgrades! Protect your planets from hordes of invaders. Defend your base using a variety of unit classes: Swordsman, Archer, Rifleman, Sniper, Heavy soldier, Ninja, Medic, Energetic, Tesla trooper, and Robot. 15 exciting levels. 9 unique units. 40 upgrades. 12 types of enemies. 3 bosses. 24 achievements. Survival mode.