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