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