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