Defend your tower at all costs and defeat all incoming enemies. Destroyed enemies drop resources, and every few waves you earn a gem to research new technologies or spend as a wildcard.
- Browser
- Kongregate
- Free
- Classic
How it plays
Survive. Upgrade. Research.
Defend your tower
Defeat all incoming enemies. Destroyed enemies drop resources, and every 25, 10 or 5 waves you receive a gem.
Buy upgrades
Spend resources or gems on upgrades to increase your chances of survival.
Research for good
Research new technologies to unlock stronger upgrades. Research stays, even when you start a new round.
Nine damage types
Normal, fire, ice, earth, air, electricity, darkness, nature and universal. Universal resistance affects every type.

