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