Planet Hero is a top-down 3D shoot 'em up where you defend planets against relentless waves of alien monsters, all playable free in your browser with no download required. You control a guardian on the ground, blasting through increasingly tough enemy formations while collecting coins and power-ups between rounds. The core loop is simple but gets intense fast – survive the wave, upgrade your setup, repeat.

What keeps Planet Hero interesting is the hero recruitment system. You can unlock characters with unique special abilities and build a team that fights alongside you, which means strategy matters as much as trigger speed. Boosters and evolving upgrades let you tailor your build toward damage output, survivability, or ally strength. Early on, prioritize coin collection to unlock support heroes faster – they make a noticeable difference when enemy numbers spike in later waves.

This game hits the sweet spot for fans of top-down alien shooter games, free survival action games, and anyone who enjoys arcade-style space defense gameplay. If you like titles such as endless wave shooters or sci-fi tower defense hybrids, Planet Hero delivers that same satisfying progression. It works great on desktop browsers and is perfect for quick sessions or longer grind runs. Search terms like free online 3D space shooter, alien wave survival game, and browser shoot 'em up all lead here for good reason – Planet Hero delivers solid arcade action without any friction.