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