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 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 Greenmuck and its minions.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
Defeat Ulguk-Hai the Troll Warlord.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Defeat Sarelgaz and its minions.
Do not let The Kingpin escape.
Complete all iron stages.
Defeat Gul'Thak and its minions.
Find the elusive acorn.
Help Fredo escape.
Complete all heroic stages.
Build 4 Tesla towers in any stage.
Complete the campaign.
Defeat Vez'nan.
Train 1.00 soldiers.
Hold 500 or more enemies with Wrath of the Forest.
Change soldiers' rally point 200 times.
Shoot 100 missiles.
Kill 300 enemies with electricity.
Build all 8 towers specializations.
Drop 1.000 or more bomblets with the cluster bomb.
Teleport 250 or more enemies.
Polymorph 50 enemies into sheep.
Summon 5 rock elementals in any one stage.
Throw 500 or more axes.
Have a single barbarian kill 10 enemies.
Snipe 50 enemies.
Have your Paladins perform 100 Holy Strikes.
Disintegrate 50 or more enemies.
Earn 45 stars.
Kill 50 enemies by poison damage.
Kill 10.000 enemies.
Sell 30 towers.
Recruit max elves at The Silveroak Outpost.
Kill 10 or more sheep with your hands.
Send 1.000 soldiers to their deaths.
Have your Paladins heal a total of 7.000 life.
Have your soldiers survive the explosion of 300 demons.
Have your soldiers regenerate a total of 50.000 life.
Earn 30 stars.
Sell 5 towers in a single mission.
Catch a fish.
Defeat J.T.
Free the sasquatch on the Icewind Pass.
Kill 2.500 enemies
Train a hero up to max level.
Build 150 towers.
Have at least 3 Imperial Guards survive in the Citadel.
Upgrade all basic tower types to level3.
Defeat The Juggernaut
Build 100 towers.
Earn 15 stars.
Kill 100 enemies with meteor showers.
Use Rain of Fire 5 times in a single stage.
Train a hero up to level 5.
Build 30 towers.
Kill 500 enemies.
Open 5 information cards.
Call a wave within 3 seconds of the icon showing up.
Call 10 waves early.
Call all waves early in a single mission.
Kill one enemy.
Complete the campaign in Veteran mode.
Fire the Sunray 20 times.