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