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