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