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