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