Here is the full list of all 44 Age of Defense achievements.
Master the technology of stone laying.
Learn all skills that reduce the cost of towers.
Kill the meatball monster.
Have a pet fish, a bird and a dinosaur on one map.
Make a voodoo mage create a meat golem.
Find a broken flying saucer.
Meet the sky people.
Defeat Archeopteryx.
Unlock Madman mode and kill the Giant Octopus in it.
Kill 750 unicellular organisms.
Survive on any 9 maps in Chief mode.
Unlock the Chief mode and survive in it on the first mission.
Survive on 11 maps by fulfilling the condition on the clay tablet.
Upgrade any tower to the maximum.
Survive on the map by fulfilling the condition on the clay tablet.
Pass 9th mission
Use the magic of the sky people.
Learn all types of traps.
Pass 8th mission
Accumulate 99 skill points.
Learn all skills in any of the four skill trees.
Learn any 25 skills.
Learn any skill.
Pass 7th mission
Fight off enemies enslaved by Frostmourne.
Pass 6th mission
Pass 5th mission
Kill 2250 primates.
Kill 2750 birds.
Defeat the Giant Woolly Worm.
Get into the cartoon cave and watch any of them.
Pass 4th mission
Kill 1500 dinosaurs.
Kill 1250 fish.
Pass 3th mission
Survive the great blizzard with the help of coal.
Survive on all maps in all modes.
Witness how Zeratul saves dinosaurs from extinction by destroying a meteorite.
Pass second mission
Pass first mission
Find and tame Ambulocetus.
See how it begun
Wake up the old mage
Start the game