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