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