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