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