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