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