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