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