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.
Fire the Sunray 20 times.
Complete the campaign in Veteran mode.
Capture the attention of the mysterious crow.
Defeat Lord Blackburn to avoid war between kingdoms.
Discover the hidden monster under water.
Find the ninja master rat.
Kill 15 Wererats before they sicken any soldier.
Defeat Moloch the Demon Overlord.
Have your Elves deal 10000 points of damage.
Complete all heroic stages.
Complete all iron stages.
Free the sasquatch on the Icewind Pass.
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.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Catch a fish.
Defeat Sarelgaz and its minions.
Help Fredo escape.
Do not let The Kingpin escape.
Change soldiers' rally point 200 times.
Kill 10 or more sheep with your hands.
Defeat Gul'Thak and its minions.
Shoot 100 missiles.
Drop 1.000 or more bomblets with the cluster bomb.
Sell 30 towers.
Sell 5 towers in a single mission.
Summon 5 rock elementals in any one stage.
Have a single barbarian kill 10 enemies.
Complete the campaign.
Earn 45 stars.
Defeat Vez'nan.
Build 4 Tesla towers in any stage.
Teleport 250 or more enemies.
Throw 500 or more axes.
Have your soldiers survive the explosion of 300 demons.
Have your Paladins perform 100 Holy Strikes.
Have your Paladins heal a total of 7.000 life.
Disintegrate 50 or more enemies.
Recruit max elves at The Silveroak Outpost.
Train 1.00 soldiers.
Hold 500 or more enemies with Wrath of the Forest.
Kill 300 enemies with electricity.
Polymorph 50 enemies into sheep.
Build all 8 towers specializations.
Send 1.000 soldiers to their deaths.
Snipe 50 enemies.
Earn 30 stars.
Defeat J.T.
Have your soldiers regenerate a total of 50.000 life.
Kill 10.000 enemies.
Kill 50 enemies by poison damage.
Build 150 towers.
Kill 100 enemies with meteor showers.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Use Rain of Fire 5 times in a single stage.
Upgrade all basic tower types to level3.
Build 100 towers.
Call all waves early in a single mission.
Earn 15 stars.
Train a hero up to max level.
Train a hero up to level 5.
Open 5 information cards.
Kill 2.500 enemies
Build 30 towers.
Call 10 waves early.
Call a wave within 3 seconds of the icon showing up.
Kill 500 enemies.
Kill one enemy.