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