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