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