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