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