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