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