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