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