Here is the full list of all 51 Gwent: The Witcher Card Game trophies - there are 42 bronze, 5 silver, 3 gold and 1 platinum.
Get all trophies.
Destroy a unit with Zeal before it's triggered.
Win a multiplayer game without Golden cards in your deck.
Spawn five allies in a single turn.
Fill your opponent's side of the board with row effects.
Win a game using 15 special cards.
Have card advantage of 3 cards.
Destroy a unit that is Immune.
Destroy a Doomed enemy with a Doomed ally.
Play 5 cards in single turn.
Start a round with 10 points on the board.
Obtain at least one leader from each faction.
Smash 100 kegs.
Own at least 150 premium cards
Complete an arena run with at least 6 wins.
Win a Regular Battle without redrawing any cards.
Reach Prestige 1.
Have 3 copies of the same card in an arena deck.
Mill 50 cards.
Finish a contract with Gaunter (complete an arena run).
Play a card from 5 different factions during a match.
Control at least 5 cards with the same power.
Get a draw in a multiplayer game.
Play one arena game.
Resurrect at least 5 cards in a match.
Send "GG" 50 times.
Use 10 order charges in a single turn.
Deal a total of 30 damage to units in one multiplayer game.
Win a multiplayer game by 50 or more points.
Boost unit to over a 30 points in a multiplayer game.
Equip a vanity leader skin, an avatar, a border and a title
Transmute a card.
Win a battle without killing any of the opponent's units.
Win a round with only Order units.
Destroy a Legendary enemy with a Common ally.
Collect 50 unique cards from 1 faction
Win a round and game, after losing by 20 points.
Win a game with 2 cards remaining in hand.
Reach Rank 20
Play a maximum number of units into any single row.
Have 4 artifacts in play at any time.
Have a winstreak of 3 in any multiplayer game mode.
Finish 3 online matches
Fully deplete your deck.
Play one ranked game.
Destroy 3 or more units with single card.
Order 3 units in a single turn.
Play a bronze and a gold card in a multiplayer game.
Reach level 15
Reach level 40
Complete the basic tutorial.