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.
Complete all heroic stages.
Complete all iron stages.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
Defeat Myconid, the Rotten Fungus.
Kill 25 Shrooms without them poisoning your soldiers.
Defeat Greenmuck and its minions.
Defeat Lord Blackburn to avoid war between kingdoms.
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.
Defeat Sarelgaz and its minions.
Do not let The Kingpin escape.
Find the ninja master rat.
Polymorph 50 enemies into sheep.
Discover the hidden monster under water.
Capture the attention of the mysterious crow.
Defeat Gul'Thak and its minions.
Kill 15 Wererats before they sicken any soldier.
Help Fredo escape.
Complete the campaign.
Earn 45 stars.
Defeat Vez'nan.
Train a hero up to max level.
Sell 30 towers.
Hold 500 or more enemies with Wrath of the Forest.
Teleport 250 or more enemies.
Summon 5 rock elementals in any one stage.
Disintegrate 50 or more enemies.
Drop 1.000 or more bomblets with the cluster bomb.
Snipe 50 enemies.
Have your Paladins heal a total of 7.000 life.
Have your soldiers survive the explosion of 300 demons.
Shoot 100 missiles.
Kill 300 enemies with electricity.
Kill 10.000 enemies.
Build all 8 towers specializations.
Build 4 Tesla towers in any stage.
Defeat J.T.
Fire the Sunray 20 times.
Earn 30 stars.
Throw 500 or more axes.
Have a single barbarian kill 10 enemies.
Free the sasquatch on the Icewind Pass.
Change soldiers' rally point 200 times.
Have your Elves deal 10000 points of damage.
Train 1.00 soldiers.
Have your Paladins perform 100 Holy Strikes.
Have your soldiers regenerate a total of 50.000 life.
Have at least 3 Imperial Guards survive in the Citadel.
Send 1.000 soldiers to their deaths.
Build 150 towers.
Build 100 towers.
Kill 2.500 enemies
Defeat The Juggernaut
Kill 50 enemies by poison damage.
Upgrade all basic tower types to level3.
Recruit max elves at The Silveroak Outpost.
Earn 15 stars.
Call 10 waves early.
Train a hero up to level 5.
Kill 100 enemies with meteor showers.
Build 30 towers.
Sell 5 towers in a single mission.
Kill 500 enemies.
Use Rain of Fire 5 times in a single stage.
Open 5 information cards.
Catch a fish.
Kill 10 or more sheep with your hands.
Call all waves early in a single mission.
Kill one enemy.
Call a wave within 3 seconds of the icon showing up.