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