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