
I've heard differing things on that. It used to be that people claimed that Shenmue is what bankrupted Sega and drove them into third party status, though that's a bit reductionist. Yu Suzuki, the creator of Shenmue, said later that this wasn't the case, that Sega just fell victim to the results of multiple failed consoles and an inability to compete with Nintendo, Sony, and Microsoft. But it is also true that he got "kicked upstairs" into an office job where he had few duties despite still getting paid, and that's a typical passive-aggresive way in which corporations punish miscreants. It's clear he wanted to do a lot more with Shenmue than he did, and stuff had to be cut for time and budget reasons.