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