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