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