Construct a lumbermill early in the game

Construct a quarry early in the game

Construct an iron mine early in the game

Use the catapult

Use the cannon

Have the spikes around castle or outpost deal the killing blow to an enemy

Light a tar field on fire

Kill an enemy with a burning tar field

Construct all four towers

Construct all buildings

Do not take any damage the first day!

Reach wave 5 in Arcade mode

Reach wave 20 in arcade mode

Reach wave 30 in arcade mode

Beat someone in a multiplayer match!

Finish North mission on Hard

Finish North mission on Impossible

Upgrade a unit to the next tier

Share your arcade score online

Share your mission score online

Heal one of your units with the surgery

Win 10 multiplayer games!

Win 30 multiplayer games!

Finish West mission on Hard

Finish West mission on Impossible

Destroy an opponent's outpost in a multiplayer match