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