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