Here is the full list of all 74 Kingdom Rush achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete all iron stages.
Complete all heroic stages.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
Defeat Lord Blackburn to avoid war between kingdoms.
Find the 5 legendary lost ice-shrooms.
Discover the hidden monster under water.
Defeat Myconid, the Rotten Fungus.
Kill 25 Shrooms without them poisoning your soldiers.
Defeat Sarelgaz and its minions.
Defeat Ulguk-Hai the Troll Warlord.
Defeat 10 Troll Pathfinders while they're treading on ice.
Defeat Greenmuck and its minions.
Catch a fish.
Have your Elves deal 10000 points of damage.
Help Fredo escape.
Do not let The Kingpin escape.
Polymorph 50 enemies into sheep.
Summon 5 rock elementals in any one stage.
Have at least 3 Imperial Guards survive in the Citadel.
Capture the attention of the mysterious crow.
Change soldiers' rally point 200 times.
Sell 30 towers.
Sell 5 towers in a single mission.
Kill 15 Wererats before they sicken any soldier.
Find the ninja master rat.
Have your Paladins perform 100 Holy Strikes.
Recruit max elves at The Silveroak Outpost.
Kill 10 or more sheep with your hands.
Find the elusive acorn.
Earn 45 stars.
Snipe 50 enemies.
Free the sasquatch on the Icewind Pass.
Defeat Gul'Thak and its minions.
Complete the campaign.
Defeat Vez'nan.
Drop 1.000 or more bomblets with the cluster bomb.
Kill 50 enemies by poison damage.
Have a single barbarian kill 10 enemies.
Build 4 Tesla towers in any stage.
Teleport 250 or more enemies.
Throw 500 or more axes.
Have your soldiers survive the explosion of 300 demons.
Shoot 100 missiles.
Have your Paladins heal a total of 7.000 life.
Kill 300 enemies with electricity.
Build all 8 towers specializations.
Call all waves early in a single mission.
Earn 30 stars.
Defeat J.T.
Train 1.00 soldiers.
Train a hero up to max level.
Kill 10.000 enemies.
Have your soldiers regenerate a total of 50.000 life.
Send 1.000 soldiers to their deaths.
Use Rain of Fire 5 times in a single stage.
Defeat The Juggernaut
Train a hero up to level 5.
Hold 500 or more enemies with Wrath of the Forest.
Disintegrate 50 or more enemies.
Kill 100 enemies with meteor showers.
Upgrade all basic tower types to level3.
Build 150 towers.
Earn 15 stars.
Build 100 towers.
Kill 2.500 enemies
Open 5 information cards.
Call 10 waves early.
Build 30 towers.
Kill 500 enemies.
Call a wave within 3 seconds of the icon showing up.
Kill one enemy.
Complete the campaign in Veteran mode.
Fire the Sunray 20 times.