Fully upgrade a Unit
Fully upgrade a Building
Acquire a Legendary Rune
Own 6 Gold Mines at once
Fully upgrade a Hero Skill
Complete Stages 1-30 with Knight, Paladin, and Engineer
Reach Stage 21 on the Beach Campaign
Level up a Hero to Level 30
Complete Stages 1-30 on both campaigns with all heroes
Level up a Hero to Level 50
Level up all Heroes to Level 10
Last 10 minutes on Stage 31
Reach Stage 31
Last 10 minutes on Stage 21 on the Beach Campaign