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