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.
Fire the Sunray 20 times.
Defeat Greenmuck and its minions.
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.
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.
Help Fredo escape.
Do not let The Kingpin escape.
Defeat Gul'Thak and its minions.
Complete the campaign in Veteran mode.
Have your Elves deal 10000 points of damage.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
Complete all iron stages.
Complete all heroic stages.
Recruit max elves at The Silveroak Outpost.
Earn 45 stars.
Drop 1.000 or more bomblets with the cluster bomb.
Have a single barbarian kill 10 enemies.
Throw 500 or more axes.
Shoot 100 missiles.
Snipe 50 enemies.
Change soldiers' rally point 200 times.
Kill 10.000 enemies.
Complete the campaign.
Defeat Vez'nan.
Kill 300 enemies with electricity.
Have your Paladins perform 100 Holy Strikes.
Teleport 250 or more enemies.
Have your Paladins heal a total of 7.000 life.
Have your soldiers survive the explosion of 300 demons.
Train 1.00 soldiers.
Build 150 towers.
Hold 500 or more enemies with Wrath of the Forest.
Earn 30 stars.
Build 4 Tesla towers in any stage.
Send 1.000 soldiers to their deaths.
Build all 8 towers specializations.
Defeat J.T.
Polymorph 50 enemies into sheep.
Summon 5 rock elementals in any one stage.
Have your soldiers regenerate a total of 50.000 life.
Disintegrate 50 or more enemies.
Train a hero up to max level.
Free the sasquatch on the Icewind Pass.
Have at least 3 Imperial Guards survive in the Citadel.
Build 100 towers.
Kill 50 enemies by poison damage.
Kill 2.500 enemies
Defeat The Juggernaut
Train a hero up to level 5.
Earn 15 stars.
Call 10 waves early.
Kill 100 enemies with meteor showers.
Upgrade all basic tower types to level3.
Sell 30 towers.
Open 5 information cards.
Kill 500 enemies.
Use Rain of Fire 5 times in a single stage.
Build 30 towers.
Catch a fish.
Sell 5 towers in a single mission.
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.
Kill one enemy.