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.
Defeat Lord Blackburn to avoid war between kingdoms.
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 9 legions before they replicate.
Complete the campaign in Veteran mode.
Defeat Gul'Thak and its minions.
Find the 5 legendary lost ice-shrooms.
Catch a fish.
Find the ninja master rat.
Capture the attention of the mysterious crow.
Discover the hidden monster under water.
Help Fredo escape.
Build 4 Tesla towers in any stage.
Summon 5 rock elementals in any one stage.
Fire the Sunray 20 times.
Kill 15 Wererats before they sicken any soldier.
Defeat 10 Troll Pathfinders while they're treading on ice.
Do not let The Kingpin escape.
Defeat Greenmuck and its minions.
Drop 1.000 or more bomblets with the cluster bomb.
Free the sasquatch on the Icewind Pass.
Defeat Sarelgaz and its minions.
Have your Elves deal 10000 points of damage.
Earn 45 stars.
Shoot 100 missiles.
Kill 300 enemies with electricity.
Find the elusive acorn.
Sell 5 towers in a single mission.
Have your Paladins perform 100 Holy Strikes.
Complete the campaign.
Defeat Vez'nan.
Sell 30 towers.
Snipe 50 enemies.
Polymorph 50 enemies into sheep.
Train 1.00 soldiers.
Teleport 250 or more enemies.
Kill 10.000 enemies.
Kill 10 or more sheep with your hands.
Build all 8 towers specializations.
Change soldiers' rally point 200 times.
Have your soldiers survive the explosion of 300 demons.
Earn 30 stars.
Send 1.000 soldiers to their deaths.
Have your Paladins heal a total of 7.000 life.
Train a hero up to max level.
Disintegrate 50 or more enemies.
Defeat J.T.
Hold 500 or more enemies with Wrath of the Forest.
Kill 50 enemies by poison damage.
Have at least 3 Imperial Guards survive in the Citadel.
Have your soldiers regenerate a total of 50.000 life.
Throw 500 or more axes.
Build 150 towers.
Have a single barbarian kill 10 enemies.
Upgrade all basic tower types to level3.
Defeat The Juggernaut
Kill 2.500 enemies
Build 100 towers.
Earn 15 stars.
Call 10 waves early.
Recruit max elves at The Silveroak Outpost.
Kill 100 enemies with meteor showers.
Train a hero up to level 5.
Use Rain of Fire 5 times in a single stage.
Open 5 information cards.
Build 30 towers.
Kill 500 enemies.
Call all waves early in a single mission.
Call a wave within 3 seconds of the icon showing up.
Kill one enemy.