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