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