Here is the full list of all 45 GWENT: Rogue Mage (Single-Player Expansion) achievements.
Reach Level 15.
Find the source of magical energy in the Ruins on your first try.
Win 10 battles.
Win a battle with a 1-point difference.
Reach Level 5.
Win a battle without spending Energy.
Play 7 cards in a single turn.
Defeat the Mage Hunter.
Lose your first run.
Reach Level 1.
Win a battle with a point difference of at least 100.
Win a battle.
Give the Dwarven Trader what he is looking for.
Unlock every other Achievement.
Defeat the White Dragon after destroying her Wings.
Finish a run on the Grandmaster difficulty.
Finish your first run.
Discover the secret behind the Ancient Writings.
Defeat the Fiery Fiend.
Have 5 or more Treasures in your deck.
Defeat the Mountain King.
Reach Level 50.
Complete a run in 30 minutes or less.
Gain the favor of a God.
Defeat the Swamp Monster.
Offer the Golden Nekker to a wishing well.
Defeat the High Prosecutor.
Watch the credits till the end.
Have a unit with 100 or more power during a battle.
Free the Thing From the Box.
Finish a run on the Novice difficulty.
Answer the Trickster's riddle correctly.
Finish a run on the Apprentice difficulty.
Win against the Gambler three times in a row.
Reach Level 25.
Finish a run on the Master difficulty.
Defeat every enemy.
Defeat the High Prosecutor after disposing of his Enforcers.
Reach Level 100.
Finish a run on the Adept difficulty.
Defeat the Failed Experiment without using the Serum.
Resurrect the Ancient Warrior.
Defeat the Failed Experiment.
Defeat the White Dragon.
Win 100 battles.