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