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