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