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