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