Here is the full list of all 50 Gwent: The Witcher Card Game achievements worth 1,000 gamerscore.
Own at least 150 premium cards.
Reach Prestige 1.
Reach level 40.
Obtain at least one leader from each faction.
Win a game using 15 special cards.
Equip a leader skin, an avatar, a border and a title.
Smash 100 kegs.
Destroy a Doomed enemy with a Doomed ally.
Use 10 order charges in a single turn.
Play 5 cards in single turn.
Send "GG" 50 times.
Mill 50 cards.
Spawn five allies in a single turn.
Fully deplete your deck.
Reach level 15.
Start a round with 10 points on the board.
Collect 50 unique cards from 1 faction.
Resurrect at least 5 cards in a match.
Have card advantage of 3 cards.
Have 4 artifacts in play at any time.
Control at least 5 cards with the same power.
Fill your opponent's side of the board with row effects.
Boost unit to over a 30 points in a multiplayer game.
Win a game with 2 cards remaining in hand.
Win a multiplayer game by 50 or more points.
Win a round and game, after losing by 20 points.
Play a maximum number of units into any single row.
Destroy a unit that is Immune.
Destroy a Legendary enemy with a Common ally.
Win a multiplayer game without Golden cards in your deck.
Win a round with only Order units.
Transmute a card.
Finish a contract with Gaunter (complete an arena run).
Play a card from 5 different factions during a match.
Deal a total of 30 damage to units in one multiplayer game.
Destroy 3 or more units with single card.
Order at least 3 units in a single turn.
Get a draw in a multiplayer game.
Play one arena game.
Destroy a unit with Zeal before it's triggered.
Finish 3 online matches.
Have a winstreak of 3 in any multiplayer game mode.
Win a battle without killing any of the opponent's units.
Play one ranked game.
Win a Regular Battle without redrawing any cards.
Play a bronze and a gold card in a multiplayer game.
Complete the basic tutorial.
Reach Rank 20.
Have 3 copies of the same card in an arena deck.
Complete an arena run with at least 6 wins.