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