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