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