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