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