Age of Defense achievements

Fight off enemies enslaved by Frostmourne.

Survive the great blizzard with the help of coal.

Defeat Archeopteryx.

Use the magic of the sky people.

Kill 2750 birds.

Find a broken flying saucer.

Survive on the map by fulfilling the condition on the clay tablet.

Upgrade any tower to the maximum.

Meet the sky people.

Learn all types of traps.

Learn any 25 skills.

Kill 1500 dinosaurs.