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