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.
Have your Elves deal 10000 points of damage.
Complete all heroic stages.
Complete all iron stages.
Complete the campaign in Veteran mode.
Fire the Sunray 20 times.
Complete the campaign.
Capture the attention of the mysterious crow.
Defeat Ulguk-Hai the Troll Warlord.
Defeat Lord Blackburn to avoid war between kingdoms.
Defeat Moloch the Demon Overlord.
Change soldiers' rally point 200 times.
Defeat 9 legions before they replicate.
Do not let The Kingpin escape.
Kill 50 enemies by poison damage.
Defeat Myconid, the Rotten Fungus.
Kill 25 Shrooms without them poisoning your soldiers.
Find the 5 legendary lost ice-shrooms.
Summon 5 rock elementals in any one stage.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Sell 30 towers.
Sell 5 towers in a single mission.
Defeat Greenmuck and its minions.
Polymorph 50 enemies into sheep.
Build 4 Tesla towers in any stage.
Discover the hidden monster under water.
Train 1.00 soldiers.
Defeat Sarelgaz and its minions.
Have at least 3 Imperial Guards survive in the Citadel.
Teleport 250 or more enemies.
Earn 45 stars.
Defeat Gul'Thak and its minions.
Send 1.000 soldiers to their deaths.
Kill 15 Wererats before they sicken any soldier.
Have a single barbarian kill 10 enemies.
Find the ninja master rat.
Help Fredo escape.
Defeat Vez'nan.
Drop 1.000 or more bomblets with the cluster bomb.
Disintegrate 50 or more enemies.
Have your Paladins perform 100 Holy Strikes.
Shoot 100 missiles.
Hold 500 or more enemies with Wrath of the Forest.
Snipe 50 enemies.
Earn 30 stars.
Have your soldiers survive the explosion of 300 demons.
Kill 300 enemies with electricity.
Build all 8 towers specializations.
Defeat J.T.
Have your soldiers regenerate a total of 50.000 life.
Throw 500 or more axes.
Kill 10.000 enemies.
Use Rain of Fire 5 times in a single stage.
Kill 100 enemies with meteor showers.
Have your Paladins heal a total of 7.000 life.
Free the sasquatch on the Icewind Pass.
Build 150 towers.
Defeat The Juggernaut
Train a hero up to max level.
Kill 2.500 enemies
Build 100 towers.
Upgrade all basic tower types to level3.
Earn 15 stars.
Recruit max elves at The Silveroak Outpost.
Train a hero up to level 5.
Open 5 information cards.
Call 10 waves early.
Build 30 towers.
Call a wave within 3 seconds of the icon showing up.
Catch a fish.
Kill 500 enemies.
Kill 10 or more sheep with your hands.
Call all waves early in a single mission.
Kill one enemy.