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