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