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