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