Destroy 1000 enemies
Scare off 100 enemies
Kill a champion while he carries a gem
Kill a champion ninja
Upgrade a tower to the highest (7) level
Build 200 towers
Upgrade 500 towers
Cut 100 forests out
Use frenzy spell 10 times
Destroy 5 enemies with a single meteor spell
Learn the Poison Mastery skill
Learn the Ice Mastery skill
Learn the Fire Mastery skill
Maximize all the skills
Complete a mission with the Brilliant rating
Save 30 gems
Achieve 5th level of a character
Achieve 10th level of a character
Complete all the missions
Complete all the missions with Excellent or Brilliant rating
Complete all the missions with the Brilliant rating