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