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