Castle Doombad Classic achievements

Unlock Evilstein's Moon Base

Defeat 500 pesky heroes

Fully upgrade every trap and Doomkin

Crush 50 heroes with the Giant Boulder of Doom

Crown a Sinister Stage

Crown a Moon Base Sinister Stage without power-ups

Fully upgrade 10 traps or Doomkins

Unlock Chapter 3 in Classic Mode

Liquidate the Lifeguard

Unlock Chapter 2 in Classic Mode

Fully upgrade a trap or Doomkin

Disintigrate the Space Hero