Protect the Core through 16 waves per level. Enemies follow the path; each leak costs lives. On wave 16, the level only clears after the Main Boss is defeated.

Pick a turret on the left, place it on a glowing build tile, then press START. Kill enemies for gold, upgrade your best towers, and prepare before the next wave.

After a wave ends, the next wave starts after the intermission. Press SKIP to launch early and gain a short damage/fire-rate bonus plus extra gold.

Turrets have different jobs: single-target, chain, cone slow, beam, splash, poison, sniper, support, drones, and traps. Select a turret to sell it, change targeting, or upgrade it.

Each turret has 5 upgrade tiers. Every tier offers two choices, so build toward the role you need: more damage, more control, better shields/armor answers, or wider coverage.

Build tiles can be blocked by Corruption; cleanse them with gold. Locked Power Tiles can be bought later and boost turrets placed on them.

Physical is reduced by armor. Energy is strong utility but shields absorb it first. Chemical damage-over-time is good into armor. True damage ignores defenses.

Watch for armor, shields, flying enemies that avoid traps, stealth enemies that need reveal, splitters, regenerators, shield drones, blinkers, minibosses, and final bosses.

Use EMP to break shields, Pulse Burst to supercharge one turret, and Overcharge to speed up all turrets. Keys 1/2/3 trigger them.

Each level has its own enemy mix, and waves get harder inside that level. Survive the main boss to move to a new map with a new level style.

Drag to pan, mouse wheel to zoom, right-click or Esc to cancel build mode, and use the speed button to cycle 1x/2x/3x/4x.