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