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.
Have your Elves deal 10000 points of damage.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
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.
Capture the attention of the mysterious crow.
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.
Defeat Sarelgaz and its minions.
Kill 50 enemies by poison damage.
Complete all iron stages.
Complete all heroic stages.
Build 4 Tesla towers in any stage.
Shoot 100 missiles.
Teleport 250 or more enemies.
Polymorph 50 enemies into sheep.
Do not let The Kingpin escape.
Throw 500 or more axes.
Snipe 50 enemies.
Find the elusive acorn.
Sell 30 towers.
Have your Paladins perform 100 Holy Strikes.
Have at least 3 Imperial Guards survive in the Citadel.
Change soldiers' rally point 200 times.
Earn 45 stars.
Sell 5 towers in a single mission.
Help Fredo escape.
Defeat Gul'Thak and its minions.
Disintegrate 50 or more enemies.
Complete the campaign.
Defeat Vez'nan.
Drop 1.000 or more bomblets with the cluster bomb.
Hold 500 or more enemies with Wrath of the Forest.
Have your soldiers survive the explosion of 300 demons.
Summon 5 rock elementals in any one stage.
Earn 30 stars.
Kill 300 enemies with electricity.
Have your Paladins heal a total of 7.000 life.
Build all 8 towers specializations.
Defeat J.T.
Train 1.00 soldiers.
Kill 10.000 enemies.
Have your soldiers regenerate a total of 50.000 life.
Have a single barbarian kill 10 enemies.
Send 1.000 soldiers to their deaths.
Train a hero up to max level.
Free the sasquatch on the Icewind Pass.
Recruit max elves at The Silveroak Outpost.
Catch a fish.
Defeat The Juggernaut
Upgrade all basic tower types to level3.
Build 150 towers.
Earn 15 stars.
Kill 2.500 enemies
Train a hero up to level 5.
Build 100 towers.
Kill 100 enemies with meteor showers.
Use Rain of Fire 5 times in a single stage.
Open 5 information cards.
Build 30 towers.
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.