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