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