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