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