Act IV: Sixty Waves and a Final Boss

New

• The game is now 60 waves long. After wave 45 comes Act IV: The Maul, fifteen new waves that end with the Furnace Colossus
• Four new bosses: the Thornwarden (an armoured tree that heals), the Siegebreaker (the heaviest armour in the game), the Stormwake (a flying storm roc that heals) and the Furnace Colossus, the final boss of wave 60
• Bosses hit harder at the gate: every ground boss that reaches the goal, the Furnace Colossus included, takes 3 lives (flying bosses take 1)

Balance

• Waves 1–30 have more creeps (about a third more), and each creep has less HP and gives less gold
• Waves 31–45 grow a little more slowly, and Act IV is where the real test is: you need strong, fully upgraded towers to finish it
• Hard creeps have 10% more HP, Easy creeps have less HP
• Storm and Light hit harder, and the Tempest much harder. Fire is a little stronger; Water, Nature and Arcane a little weaker
• Free play still covers waves 1–25