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