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