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