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