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