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