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.
Complete all iron stages.
Capture the attention of the mysterious crow.
Discover the hidden monster under water.
Find the ninja master rat.
Change soldiers' rally point 200 times.
Sell 30 towers.
Free the sasquatch on the Icewind Pass.
Catch a fish.
Help Fredo escape.
Find the elusive acorn.
Find the 5 legendary lost ice-shrooms.
Fire the Sunray 20 times.
Complete all heroic stages.
Defeat Moloch the Demon Overlord.
Defeat Lord Blackburn to avoid war between kingdoms.
Summon 5 rock elementals in any one stage.
Defeat Myconid, the Rotten Fungus.
Kill 25 Shrooms without them poisoning your soldiers.
Have your Elves deal 10000 points of damage.
Recruit max elves at The Silveroak Outpost.
Sell 5 towers in a single mission.
Kill 10 or more sheep with your hands.
Complete the campaign.
Defeat Ulguk-Hai the Troll Warlord.
Throw 500 or more axes.
Build 4 Tesla towers in any stage.
Defeat 9 legions before they replicate.
Kill 50 enemies by poison damage.
Shoot 100 missiles.
Drop 1.000 or more bomblets with the cluster bomb.
Defeat Greenmuck and its minions.
Snipe 50 enemies.
Kill 15 Wererats before they sicken any soldier.
Defeat Sarelgaz and its minions.
Polymorph 50 enemies into sheep.
Defeat 10 Troll Pathfinders while they're treading on ice.
Have a single barbarian kill 10 enemies.
Do not let The Kingpin escape.
Defeat Gul'Thak and its minions.
Hold 500 or more enemies with Wrath of the Forest.
Kill 300 enemies with electricity.
Have at least 3 Imperial Guards survive in the Citadel.
Earn 45 stars.
Defeat Vez'nan.
Teleport 250 or more enemies.
Build all 8 towers specializations.
Disintegrate 50 or more enemies.
Have your soldiers survive the explosion of 300 demons.
Train a hero up to max level.
Have your Paladins heal a total of 7.000 life.
Have your Paladins perform 100 Holy Strikes.
Earn 30 stars.
Have your soldiers regenerate a total of 50.000 life.
Defeat J.T.
Train a hero up to level 5.
Kill 10.000 enemies.
Train 1.00 soldiers.
Send 1.000 soldiers to their deaths.
Kill 100 enemies with meteor showers.
Upgrade all basic tower types to level3.
Defeat The Juggernaut
Build 150 towers.
Earn 15 stars.
Kill 2.500 enemies
Build 100 towers.
Use Rain of Fire 5 times in a single stage.
Build 30 towers.
Open 5 information cards.
Kill 500 enemies.
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.