Planet Hero

Planet Hero is a top-down 3D action game about holding a line that keeps moving. You defend planets from waves of alien monsters, and each wave brings tougher challenges paired with new power-ups, allies and upgrades, so the difficulty and your capacity to meet it climb together. The part that gives it depth is recruitment: you can bring unique heroes with special abilities to fight beside you, which turns a solo defence into managing a small force. Coins collected during the fighting unlock boosters and let you evolve your team, meaning the choices you make between waves shape what the next one looks like. Becoming the ultimate guardian of the galaxy is the stated ambition.