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