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