Xbox-owner Microsoft has acquired the games company behind blockbuster titles including Doom, Fallout, Skyrim and Wolfenstein.
It is paying $7.5bn (£5.85bn) for Bethesda’s parent ZeniMax Media.
Xbox has said that the publisher’s franchises would be added to its Game Pass subscription package for consoles and PCs.
This could help make the forthcoming Xbox Series X more attractive than the PlayStation 5 to some players.
Both machines are due to launch in November.
Game Pass already gives players access to more than 200 games. Microsoft includes first-party titles at point of launch to those signed up to its “ultimate” package without further cost.
By contrast, Sony has opted to charge players up to £70 for its own major releases and does not intend to include new titles in its PlayStation Plus Collection service.
It is not yet clear how the takeover affects Bethesda’s plans to create The Elder Scrolls 6, Starfield and other unfinished games as cross-platform titles.