The Yakuza Complete Series - which comprises of seven games from Yakuza 0 through to Yakuza 6: The Song of Life - recently released on GOG. However, along with this release, changes have been made to the games' credits, with several former Ryu Ga Gotoku Studio staff members and entire support studios not being acknowledged for their work on the series.
As spotted by Timo653 over on Reddit, developers such as series creator Toshihiro Nagoshi and producer Daisuke Sato - who both left Sega several years ago to form Nagoshi Studio, a subsidiary of NetEase Games - are no longer credited for their work on the games.
Meanwhile, the entirety of Lab42 (which worked on 0 and Kiwami 1, helping to bring these games to PC) and QLOC (which worked on Kiwami 2 to 6) have also seen their credits removed.