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