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