Mashup Hero is a free online mecha parkour game where you sprint through obstacle courses while assembling a robot piece by piece before reaching the final arena. Swipe left or right to dodge spinning blades, barriers, and other hazards, all while snapping new parts onto your growing robot frame. Reach the end fully built and you get to unleash a devastating shockwave attack against your opponents — the bigger your bot, the harder they fall.

Each stage is short, punchy, and designed to keep you on your toes. Missing parts on the course means you arrive at the arena weaker, so clean runs actually matter. Between levels you spend earned cores on speed boosts, stronger armor, and raw attack power. New skins keep things fresh, and the courses get progressively trickier with tighter gaps and faster trap sequences. One-finger swipe controls mean zero learning curve — you're competing in seconds.

Mashup Hero is a great pick for fans of hypercasual running games, 3D robot fighting games, and quick arcade action with upgrade loops. If you enjoy games like merge runner titles or action platformers with boss fights, this one hits that same satisfying rhythm. Search terms like free robot runner game, online mecha action game, and 3D fighting parkour game all lead here — and once you start stacking those cores, it's hard to stop.