Sunharbor Defense: Endless

A standalone endless challenge on the sixth harbor map. Start with 120 resources and 20 lives; each settled wave restores one life, up to 100. Regular pressure, surge waves, major assaults every ten waves and brief recovery periods alternate. From wave 70, enemy numbers and advanced formations grow, and leaders resist repeated stuns. Initially build one laser and one missile tower. A second laser unlocks when wave 101 begins; a second missile unlocks when wave 201 begins. Fission Beetles arrive at wave 70 and eventually split into up to 16 tougher descendants, which grant no bounty. Prism Haulers arrive at wave 108 with heavy hulls and three shield sections. Frost Support Cruisers arrive at wave 130, repairing nearby aircraft below half health to 80% once per ally and freezing three to six distinct towers during each flight. Green repair effects and blue ice distinguish their abilities. Separate saves and rankings track consecutive cleared waves. Long sessions automatically protect local progress and confirm saves while connected. Split offspring move at 90% of the root speed. Carrier offspring have 45% of their parent’s health; Beetles gain 4% health per generation.

Select a weapon and place it on the map. Buildings occupy 2×2 cells and must leave both ground routes open. Select a tower to upgrade or sell. Towers stop firing while upgrading or frozen. Number keys select weapons; Space pauses; N starts the next wave early. Field guides are available from the menu and pause screen. Save resources for surge waves: advanced upgrades cost more, and selling returns half the amount actually invested. Lives are capped at 100. Progress saves automatically and can be resumed after refreshing. Connection failures trigger a protective pause. Continuing an older defense preserves waves, resources and tower placement; lives adopt the new cap and new formations begin with the next wave.