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