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