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