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