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