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.
Capture the attention of the mysterious crow.
Find the ninja master rat.
Kill 15 Wererats before they sicken any soldier.
Defeat Ulguk-Hai the Troll Warlord.
Have your Elves deal 10000 points of damage.
Find the 5 legendary lost ice-shrooms.
Defeat Sarelgaz and its minions.
Help Fredo escape.
Complete all iron stages.
Complete all heroic stages.
Do not let The Kingpin escape.
Defeat Gul'Thak and its minions.
Have your soldiers survive the explosion of 300 demons.
Complete the campaign in Veteran mode.
Train 1.00 soldiers.
Have a single barbarian kill 10 enemies.
Summon 5 rock elementals in any one stage.
Fire the Sunray 20 times.
Hold 500 or more enemies with Wrath of the Forest.
Earn 45 stars.
Kill 50 enemies by poison damage.
Defeat 10 Troll Pathfinders while they're treading on ice.
Teleport 250 or more enemies.
Polymorph 50 enemies into sheep.
Find the elusive acorn.
Have your Paladins perform 100 Holy Strikes.
Snipe 50 enemies.
Sell 30 towers.
Free the sasquatch on the Icewind Pass.
Complete the campaign.
Defeat Vez'nan.
Change soldiers' rally point 200 times.
Drop 1.000 or more bomblets with the cluster bomb.
Shoot 100 missiles.
Disintegrate 50 or more enemies.
Throw 500 or more axes.
Build 4 Tesla towers in any stage.
Catch a fish.
Sell 5 towers in a single mission.
Kill 300 enemies with electricity.
Build all 8 towers specializations.
Have your soldiers regenerate a total of 50.000 life.
Earn 30 stars.
Defeat J.T.
Have your Paladins heal a total of 7.000 life.
Send 1.000 soldiers to their deaths.
Kill 100 enemies with meteor showers.
Kill 10.000 enemies.
Build 150 towers.
Upgrade all basic tower types to level3.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Train a hero up to max level.
Build 100 towers.
Earn 15 stars.
Recruit max elves at The Silveroak Outpost.
Use Rain of Fire 5 times in a single stage.
Kill 10 or more sheep with your hands.
Train a hero up to level 5.
Kill 2.500 enemies
Build 30 towers.
Open 5 information cards.
Call 10 waves early.
Kill 500 enemies.
Call all waves early in a single mission.
Call a wave within 3 seconds of the icon showing up.
Kill one enemy.