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