Sega is among the latest batch of publishers to make their PC games available on EA's Origin digital download platform.
Total War: Shogun 2 - Fall of the Samurai will be the first of its games to be sold in the online store, with pre-orders open now.
Team 17, Rebellion and Kalypso Media Digital have also been added, among others, bringing the total number of third parties on the platform to 35.
"By partnering with publishers like SEGA, we're able to bring even more of the industry's best games to players on Origin," commented EA exec Craig Rechenmacher.
"With 11 million registered users around the world, Origin is fast becoming the destination for consumers looking for fresh new content to play with their friends."
EA's store launched in June last year. See Eurogamer's industry-wide investigation for insight on how its ascent might impact the Steam-dominated PC download market.