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