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.
Drop 1.000 or more bomblets with the cluster bomb.
Defeat Lord Blackburn to avoid war between kingdoms.
Defeat Ulguk-Hai the Troll Warlord.
Defeat Greenmuck and its minions.
Discover the hidden monster under water.
Defeat 9 legions before they replicate.
Kill 50 enemies by poison damage.
Do not let The Kingpin escape.
Build all 8 towers specializations.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Defeat Sarelgaz and its minions.
Have your Paladins perform 100 Holy Strikes.
Capture the attention of the mysterious crow.
Earn 45 stars.
Kill 15 Wererats before they sicken any soldier.
Defeat Gul'Thak and its minions.
Summon 5 rock elementals in any one stage.
Snipe 50 enemies.
Find the elusive acorn.
Find the ninja master rat.
Help Fredo escape.
Complete the campaign.
Defeat Vez'nan.
Build 4 Tesla towers in any stage.
Kill 300 enemies with electricity.
Disintegrate 50 or more enemies.
Free the sasquatch on the Icewind Pass.
Kill 10.000 enemies.
Sell 30 towers.
Polymorph 50 enemies into sheep.
Have a single barbarian kill 10 enemies.
Hold 500 or more enemies with Wrath of the Forest.
Change soldiers' rally point 200 times.
Train 1.00 soldiers.
Have your soldiers survive the explosion of 300 demons.
Teleport 250 or more enemies.
Earn 30 stars.
Have your Paladins heal a total of 7.000 life.
Throw 500 or more axes.
Defeat J.T.
Send 1.000 soldiers to their deaths.
Have your soldiers regenerate a total of 50.000 life.
Sell 5 towers in a single mission.
Upgrade all basic tower types to level3.
Kill 2.500 enemies
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Build 150 towers.
Kill 100 enemies with meteor showers.
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.
Use Rain of Fire 5 times in a single stage.
Catch a fish.
Kill 10 or more sheep with your hands.
Kill 500 enemies.
Build 30 towers.
Call 10 waves early.
Call all waves early in a single mission.
Call a wave within 3 seconds of the icon showing up.
Kill one enemy.
Shoot 100 missiles.
Complete all heroic stages.
Complete all iron stages.
Defeat Moloch the Demon Overlord.
Have your Elves deal 10000 points of damage.
Complete the campaign in Veteran mode.
Fire the Sunray 20 times.