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