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