Single-player-only games are an increasingly rare breed, with only a few marquee series lacking a multiplayer component. These include the Elder Scrolls and Fallout from Bethesda Softworks, BioWare's Mass Effect and Dragon Age, and Sony's God of War.
Now, though, it looks like the latter franchise may be getting a multiplayer component. Sony Computer Entertainment America Santa Monica is currently hiring a senior online programmer to "join the God of War team!" Applicants must have experience "designing and implementing systems and tools to support networking needs (such as in-game communication, client-server, matchmaking, [and] leaderboards)." (Emphasis added.)
That latter part of the ad makes it sound like SCEA Santa Monica's next project will support online multiplayer in some form or another. (SCEA reps had not commented on the matter as of press time.) However, there is no guarantee that the studio's next game will be an entry in the God of War series, although the finale of God of War III did leave open the possibility for a sequel.
For more on God of War III, read GameSpot's full review of the game.