Full list of all 52 Ruined King: A League of Legends Story achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Unlock all alternate Skins for all Champions
Catch 10 Epic Fish
Complete 100% of the Bestiary
Enchant 30 Items
Infuse 30 Items
Infuse 10 Epic Items
Infuse 10 Rare Items
Complete the story on Story Difficulty
Complete the story on Normal Difficulty
Complete the story on Veteran Difficulty
Enchant your first Item
Acquire all Legendary Weapons
Collect all unlockable Lore entries
Catch 100 Fish
Complete all Bounty missions
Unlock all Champion Ultimate Abilities
Acquire 1 Legendary Weapon
Complete all Baron's Rest Crucible battles
Collect 5 treasures from Poro Holes
View every character dialogue when at Rest points
Pass the Test of Nagakaborous
Reach Level 30 with any Champion
Complete Windrake Island
Acquire 100,000 Gold (cumulative)
Defeat Possessed Gangplank
Defeat Thresh
Unlock an alternate Skin for any Champion
Complete 50% of Baron's Rest Crucible battles
Acquire 200 Black Marks (cumulative)
Return Maokai to full strength
Eat 15 Meals at Rest Points
Reel in a Treasure cache while fishing
Complete 50% of the Bestiary
Complete 5 Bounty missions
Unlock a Level 3 Ultimate Ability
Collect 50% of the Lore entries
Have Ahri join your Party
Meet Maokai
Have Pyke join your Party
Arrive at the Shadow Isles
Complete 25% of the Bestiary
Consume 50 Potions
Have Miss Fortune join your Party
Complete a Bounty mission
Cleanse Grey Harbor from Black Mist
Have Yasuo join your Party
Consume 10 Potions
Meet the Rumor Monger
Team up with Braum
Experience visions of Ruined King
Catch every type of fish and complete the Fishing Journal
Complete the story on Heroic Difficulty