About Harvest: Massive Encounter

All but the Wave game mode lack ending, all others endlessly increase difficulty and the number of aliens that appear with each wave until your defences are finally overpowered. The goal is to survive as many waves as possible for as long as possible. Made difficult by the need to expand your base to gather more resources, though made slightly easier by linking the laser towers for increased damage and range, so they never really lose their usefulness.