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