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