Here is the full list of all 10 Duelyst achievements.
Complete your first 10 games.
Complete your first Quest.
Play 1 game with each of the six Factions.
Complete your first 5 Quests.
Complete your first 13 Quests.
Complete your first 100 Quests.
Collect one of every Common rarity card.
Complete your first 50 games.
Play your first 20 Ranked Ladder games.
Play your first game with a Friend.