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