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