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