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