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