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