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