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.
Defeat Lord Blackburn to avoid war between kingdoms.
Do not let The Kingpin escape.
Defeat Myconid, the Rotten Fungus.
Kill 25 Shrooms without them poisoning your soldiers.
Have your Elves deal 10000 points of damage.
Discover the hidden monster under water.
Capture the attention of the mysterious crow.
Defeat Ulguk-Hai the Troll Warlord.
Kill 15 Wererats before they sicken any soldier.
Defeat Greenmuck and its minions.
Defeat Sarelgaz and its minions.
Drop 1.000 or more bomblets with the cluster bomb.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
Find the ninja master rat.
Find the 5 legendary lost ice-shrooms.
Help Fredo escape.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Catch a fish.
Kill 10 or more sheep with your hands.
Polymorph 50 enemies into sheep.
Defeat Gul'Thak and its minions.
Shoot 100 missiles.
Summon 5 rock elementals in any one stage.
Build 4 Tesla towers in any stage.
Complete all iron stages.
Complete all heroic stages.
Kill 300 enemies with electricity.
Free the sasquatch on the Icewind Pass.
Have at least 3 Imperial Guards survive in the Citadel.
Recruit max elves at The Silveroak Outpost.
Earn 45 stars.
Change soldiers' rally point 200 times.
Sell 30 towers.
Complete the campaign.
Defeat Vez'nan.
Snipe 50 enemies.
Kill 10.000 enemies.
Hold 500 or more enemies with Wrath of the Forest.
Build all 8 towers specializations.
Disintegrate 50 or more enemies.
Teleport 250 or more enemies.
Have your Paladins perform 100 Holy Strikes.
Have your Paladins heal a total of 7.000 life.
Have your soldiers survive the explosion of 300 demons.
Build 150 towers.
Earn 30 stars.
Train 1.00 soldiers.
Kill 50 enemies by poison damage.
Have your soldiers regenerate a total of 50.000 life.
Defeat J.T.
Send 1.000 soldiers to their deaths.
Fire the Sunray 20 times.
Build 100 towers.
Throw 500 or more axes.
Upgrade all basic tower types to level3.
Have a single barbarian kill 10 enemies.
Train a hero up to max level.
Kill 2.500 enemies
Defeat The Juggernaut
Earn 15 stars.
Call 10 waves early.
Kill 100 enemies with meteor showers.
Train a hero up to level 5.
Build 30 towers.
Sell 5 towers in a single mission.
Kill 500 enemies.
Use Rain of Fire 5 times in a single stage.
Open 5 information cards.
Call all waves early in a single mission.
Call a wave within 3 seconds of the icon showing up.
Kill one enemy.