Build all tower types of one race in one mission.
Survive 60 waves on the Survival game mode.
Sell 10 towers in a single mission.
Destroy the Minotaur Base.
Win a level without towers.
Use the unit info 10 times.
Finish the first mission.
Finish the Campaign.
Use all Economy Upgrades in one mission.
Win 5 multiplayer match in a row.
Complete all levels in Limited Resource mode.
Unlock all achievements.