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