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