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.
Defeat 9 legions before they replicate.
Have your soldiers survive the explosion of 300 demons.
Defeat Ulguk-Hai the Troll Warlord.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Do not let The Kingpin escape.
Defeat Greenmuck and its minions.
Defeat Gul'Thak and its minions.
Defeat Sarelgaz and its minions.
Help Fredo escape.
Shoot 100 missiles.
Drop 1.000 or more bomblets with the cluster bomb.
Snipe 50 enemies.
Complete all iron stages.
Complete all heroic stages.
Train a hero up to max level.
Complete the campaign.
Defeat Vez'nan.
Have your Paladins perform 100 Holy Strikes.
Have your Paladins heal a total of 7.000 life.
Kill 50 enemies by poison damage.
Hold 500 or more enemies with Wrath of the Forest.
Sell 30 towers.
Disintegrate 50 or more enemies.
Kill 10 or more sheep with your hands.
Catch a fish.
Teleport 250 or more enemies.
Throw 500 or more axes.
Have a single barbarian kill 10 enemies.
Change soldiers' rally point 200 times.
Build 4 Tesla towers in any stage.
Kill 300 enemies with electricity.
Build all 8 towers specializations.
Summon 5 rock elementals in any one stage.
Polymorph 50 enemies into sheep.
Sell 5 towers in a single mission.
Earn 45 stars.
Call all waves early in a single mission.
Defeat J.T.
Train 1.00 soldiers.
Free the sasquatch on the Icewind Pass.
Call a wave within 3 seconds of the icon showing up.
Recruit max elves at The Silveroak Outpost.
Have your soldiers regenerate a total of 50.000 life.
Send 1.000 soldiers to their deaths.
Earn 30 stars.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Upgrade all basic tower types to level3.
Kill 10.000 enemies.
Build 150 towers.
Earn 15 stars.
Use Rain of Fire 5 times in a single stage.
Build 100 towers.
Call 10 waves early.
Train a hero up to level 5.
Open 5 information cards.
Kill 2.500 enemies
Kill 100 enemies with meteor showers.
Build 30 towers.
Kill 500 enemies.
Kill one enemy.