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