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