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