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