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