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