Marc درسته نویسنده نبوده ولی مشاور تیم نویسنده بوده
تو پرتال هم مشاور تیم نویسندگی بود
Original Half-Life writer Marc Laidlaw was heavily consulted on Half-Life: Alyx. According to Valve, though Laidlaw parted ways with the company years ago, he still happily and heavily consulted on the story...