If any show or movie based on a video game could potentially be compelling, it'd be The Witcher. And that's mainly because the video games were based on very compelling books, which I have read (they're great). And while the track record of adapting books into movies isn't perfect, the odds are better than with video games to movies.
But even in the games, the most interesting parts were the stories it would tell about different, interesting people. Small people, with their own problems, with very real and present motivations. Here's hoping this show doesn't blow!