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