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