Sega's rights as publisher of Alpha Protocol have expired

Sega's publishing rights for Alpha Protocol have now expired, resulting in the game's removal from Steam.
Eurogamer noticed that the Steam page for Obsidian Entertainment's spy-themed RPG featured the following statement from Sega, which published the game in May 2010.
"Notice: At the request of the publisher, Alpha Protocol is no longer available for sale on Steam."
A spokesperson for Sega clarified that the withdrawal of Alpha Protocol was due to the expiration of the company's publishing rights, putting the game back in the hands of Obsidian Entertainment.
https://www.gamesindustry.biz/articl...l-have-expired