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