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.
Have your Elves deal 10000 points of damage.
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.
Kill 15 Wererats before they sicken any soldier.
Defeat Sarelgaz and its minions.
Do not let The Kingpin escape.
Shoot 100 missiles.
Have a single barbarian kill 10 enemies.
Help Fredo escape.
Find the ninja master rat.
Catch a fish.
Summon 5 rock elementals in any one stage.
Defeat Ulguk-Hai the Troll Warlord.
Polymorph 50 enemies into sheep.
Teleport 250 or more enemies.
Find the 5 legendary lost ice-shrooms.
Drop 1.000 or more bomblets with the cluster bomb.
Have your Paladins perform 100 Holy Strikes.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Complete the campaign.
Complete all heroic stages.
Complete all iron stages.
Defeat Gul'Thak and its minions.
Snipe 50 enemies.
Build 4 Tesla towers in any stage.
Disintegrate 50 or more enemies.
Defeat 9 legions before they replicate.
Kill 300 enemies with electricity.
Defeat Vez'nan.
Have your soldiers survive the explosion of 300 demons.
Kill 10 or more sheep with your hands.
Build all 8 towers specializations.
Kill 50 enemies by poison damage.
Earn 45 stars.
Defeat J.T.
Train 1.00 soldiers.
Throw 500 or more axes.
Hold 500 or more enemies with Wrath of the Forest.
Kill 10.000 enemies.
Free the sasquatch on the Icewind Pass.
Sell 30 towers.
Have your soldiers regenerate a total of 50.000 life.
Send 1.000 soldiers to their deaths.
Upgrade all basic tower types to level3.
Change soldiers' rally point 200 times.
Have your Paladins heal a total of 7.000 life.
Earn 30 stars.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Train a hero up to max level.
Recruit max elves at The Silveroak Outpost.
Train a hero up to level 5.
Build 150 towers.
Earn 15 stars.
Sell 5 towers in a single mission.
Use Rain of Fire 5 times in a single stage.
Kill 100 enemies with meteor showers.
Kill 2.500 enemies
Build 100 towers.
Open 5 information cards.
Call a wave within 3 seconds of the icon showing up.
Build 30 towers.
Kill 500 enemies.
Call 10 waves early.
Call all waves early in a single mission.
Kill one enemy.
Complete the campaign in Veteran mode.
Fire the Sunray 20 times.