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