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