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