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