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