Sebastian Stępień is a Polish video game writer, narrative and setting director at CD Project Red.
Very little is known about the early life of Stępień. The first project he is credited in a 2007 action role-playing game Witcher. This is title was the first in the Witcher series and the debut of CD Project Red. Since that, Stępień has been working on every main entry in The Witcher series. In The Witcher 2: Assassins of the Kings, he was the main writer and dialogue designer. All of the games in the trilogy met critical acclaim for their story, dialogues, and characters. Currently, the writer is working on the first CD Project Red’s game, not in the Witcher universe – Cyberpunk 2077. Aside from writing, Stępień was a creative director of Witcher 3: The Wild which was the best-received game in the series and was the biggest financial success for the studio.