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