Space Invasion! Free strategy

Awesome, futuristic line defense game full of strategy and upgrades! Protect your planets from hordes of invaders. Invasion is a 2D game in the genre of Tower Defense (or Line Defense) for players of any age in which you have to stop the advancing waves of opponents, not missing anyone. To do this, you will have 10 completely different types of troops. For each of them you can study 4 additional abilities, which will greatly increase the strength of your troops. 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