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.
Capture the attention of the mysterious crow.
Defeat Lord Blackburn to avoid war between kingdoms.
Discover the hidden monster under water.
Kill 15 Wererats before they sicken any soldier.
Find the ninja master rat.
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 Ulguk-Hai the Troll Warlord.
Defeat J.T.
Find the 5 legendary lost ice-shrooms.
Defeat Sarelgaz and its minions.
Do not let The Kingpin escape.
Defeat Gul'Thak and its minions.
Complete all heroic stages.
Complete all iron stages.
Have your soldiers survive the explosion of 300 demons.
Have your Elves deal 10000 points of damage.
Change soldiers' rally point 200 times.
Help Fredo escape.
Earn 45 stars.
Have your soldiers regenerate a total of 50.000 life.
Kill 100 enemies with meteor showers.
Send 1.000 soldiers to their deaths.
Train 1.00 soldiers.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Sell 30 towers.
Summon 5 rock elementals in any one stage.
Free the sasquatch on the Icewind Pass.
Hold 500 or more enemies with Wrath of the Forest.
Kill 10 or more sheep with your hands.
Catch a fish.
Complete the campaign.
Defeat Vez'nan.
Teleport 250 or more enemies.
Kill 300 enemies with electricity.
Build 4 Tesla towers in any stage.
Build all 8 towers specializations.
Earn 30 stars.
Polymorph 50 enemies into sheep.
Throw 500 or more axes.
Snipe 50 enemies.
Kill 10.000 enemies.
Shoot 100 missiles.
Train a hero up to max level.
Drop 1.000 or more bomblets with the cluster bomb.
Have a single barbarian kill 10 enemies.
Have your Paladins perform 100 Holy Strikes.
Have your Paladins heal a total of 7.000 life.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Disintegrate 50 or more enemies.
Earn 15 stars.
Kill 50 enemies by poison damage.
Build 150 towers.
Recruit max elves at The Silveroak Outpost.
Sell 5 towers in a single mission.
Build 100 towers.
Call all waves early in a single mission.
Kill 2.500 enemies
Train a hero up to level 5.
Upgrade all basic tower types to level3.
Use Rain of Fire 5 times in a single stage.
Open 5 information cards.
Call 10 waves early.
Build 30 towers.
Kill 500 enemies.
Call a wave within 3 seconds of the icon showing up.
Kill one enemy.