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