Tower defense and idle games combined. There is an alien invasion like never before. Put your towers to work and crush the relentless invasion.
Construct fortifications by fusing towers, upgrade your weaponry with stronger turrets, unlock starships, and uncover a secret megaweapon. Play at your own pace, your comrades will dispose of stragglers.
Place turrets in strategic areas. You can invest in new towers with the biomass you earn from every kill. Strengthen your tower by merging two identical ones. Rank up and unlock access to new areas.
