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