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