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