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