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