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