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