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