Tower defense and idle games combined; this is an alien invasion like never before. Use your towers to mow down a relentless invasion. Fuse towers to strengthen your defense and advance your weaponry through stronger turrets to starships, and discover a secret mega-weapon! Play at your own pace; your comrades will dispose of stragglers. - Deploy turrets to key locations - Every kill earns you biomass; invest into new towers - Fuse two similar towers for a much stronger tower - Rank up and unlock access to new areas