Here is the full list of all 44 Chronicle: RuneScape Legends achievements.
Win any game with Morvran.
Win a least 3 games in a single dungeoneering run.
Open 10 booster packs.
Win 50 games in any mode.
Get promoted to the gold league in ranked.
Get promoted to the silver league in ranked.
Reach rank 1 in the ranked bronze league.
Gain rising star in ranked.
Complete a magic skilling challenge.
Build at least 3 custom decks.
Complete the gold tier in solo.
Have a weapon with at least 8 durability.
Craft a card in the collection.
Start a dungeoneering run.
Complete an attack skilling challenge.
Complete the silver tier in solo.
Win any game with The Raptor.
Complete a smithing skilling challenge.
Play 10 games in any mode.
Build a custom deck.
Open a booster pack.
Complete the bronze tier in solo.
Win any game with Ozan.
Win any game with Linza.
Unlock all the Legends in the game.
Have a weapon with at least 10 attack.
Win any game with Vanescula.
Have at least 5 base attack in a game.
Win any game with Ariane.
Have at least 10 armour in a game.
Complete the tutorial.
Have at least 30 gold in a game.
Draw at least 10 cards from effects in a game.
Have at least 10 base attack in a game.
Complete an entire dungeoneering run.
Win 500 games in any mode.
Get every legend to at least level 25.
Get promoted to the diamond league in ranked.
Have at least 75 armour in a game.
Have a weapon with at least 20 durability.
Have a weapon with at least 20 attack.
Have at least 15 base attack in a game.
Have at least 150 gold in a game.
Open 50 booster packs.