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