Back in March, Call of Juarez: Gunslinger was delisted from the PlayStation Store, Xbox Games Store and Steam. However, the game has now suddenly returned to the Steam storefront, with a 33% discount to boot.
It would appear this sudden departure and reappearance of the game was due to the rights of the series being acquired by the game's developer, Techland, from its former publisher, Ubisoft. In a press release, Techland Publishing CPO Adam Lason had this to say:
via destructoid https://www.destructoid.com/the-call-of-juarez-series-has-a-new-publisher-through-techland-500984.phtml