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