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