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