Swarm Out

Swarm Out is a survivor arena where a small robot attacks automatically while you control its movement. Defeated blobs drop crystals; gathering them fills the experience bar and pauses the action for a choice of three upgrades. Build around blaster shots, orbiting orbs, shock rings and support upgrades. Survive until spawning ends, then defeat the crowned boss. Later levels add stronger crowds. Optional rewarded videos offer a revive or an upgrade head start.

Keep clear of blobs while collecting their crystals. Select an upgrade at each level-up. Protect your five hearts until the timer expires, then destroy the boss to advance. Remaining health determines stars.

Desktop: Arrow keys or WASD move; 1, 2 and 3 select upgrade cards. Mobile: Drag anywhere to steer, then tap a card. Weapons fire automatically.

Circle crowds instead of backing into a wall of enemies. Gather crystals before the arena becomes congested. Leave an escape route when approaching the boss.

Automatic combat; seven upgrade types; timed arenas and bosses; browser saves; leaderboard; optional rewarded-video assistance.