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