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 the campaign.
Complete all heroic stages.
Complete all iron stages.
Do not let The Kingpin escape.
Defeat Ulguk-Hai the Troll Warlord.
Defeat Greenmuck and its minions.
Build 4 Tesla towers in any stage.
Defeat Sarelgaz and its minions.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Summon 5 rock elementals in any one stage.
Drop 1.000 or more bomblets with the cluster bomb.
Change soldiers' rally point 200 times.
Sell 30 towers.
Have at least 3 Imperial Guards survive in the Citadel.
Train 1.00 soldiers.
Earn 45 stars.
Have your Paladins perform 100 Holy Strikes.
Shoot 100 missiles.
Snipe 50 enemies.
Find the elusive acorn.
Kill 10 or more sheep with your hands.
Help Fredo escape.
Defeat Gul'Thak and its minions.
Have your Paladins heal a total of 7.000 life.
Teleport 250 or more enemies.
Polymorph 50 enemies into sheep.
Throw 500 or more axes.
Defeat Vez'nan.
Hold 500 or more enemies with Wrath of the Forest.
Disintegrate 50 or more enemies.
Kill 300 enemies with electricity.
Kill 10.000 enemies.
Build all 8 towers specializations.
Have your soldiers regenerate a total of 50.000 life.
Send 1.000 soldiers to their deaths.
Earn 30 stars.
Defeat J.T.
Train a hero up to max level.
Free the sasquatch on the Icewind Pass.
Have a single barbarian kill 10 enemies.
Kill 50 enemies by poison damage.
Upgrade all basic tower types to level3.
Build 150 towers.
Defeat The Juggernaut
Sell 5 towers in a single mission.
Kill 2.500 enemies
Build 100 towers.
Recruit max elves at The Silveroak Outpost.
Earn 15 stars.
Use Rain of Fire 5 times in a single stage.
Train a hero up to level 5.
Kill 100 enemies with meteor showers.
Open 5 information cards.
Catch a fish.
Build 30 towers.
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.