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