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