Since its introduction on Xbox Game Pass, the service has given a tremendous amount of value to subscribers by giving players the chance to play a variety of titles for a low monthly (or annual cost), and now those looking for more games to play in January have two new additions to enjoy right now.Microsoft has revealed that two surprise new additions have been brought to Xbox Game Pass for January with Just Cause 3 and Ultimate Marvel vs Capcom 3, which should be a nice bonus for those that have been playing Just Cause 4 or have been rewatching Avengers: Infinity War on Netflix for the 11th time. Notably, Just Cause 3 was previously confirmed to appear in the lineup of games for January, though it appears to have gone live an extra day early.These two titles are only just a few of the ones that have already been confirmed to be coming to Xbox Game Pass for January, which also includes recent hits like the first episode of Life is Strange 2, Absolver, and ARK: Survival Evolved.2018 proved to be a big year for Xbox Game Pass as the service truly seemed to be hitting full swing and becoming a core part of Microsoft's strategy for Xbox console owners moving forward. As the service has gained steam among the Xbox One audience, Xbox Game Pass added 116 new titles throughout last year, and the service has seen an increase of over 65 partners bringing titles and new games to Game Pass since it first launched in June 2017.Likewise, Xbox Game Pass has also been notable for bringing subscribers several titles into the fold on the same day of their worldwide release, including all of Microsoft's first-party releases such as Sea of Thieves, State of Decay 2, Forza Horizon 4, and others. This of course will also apply to upcoming exclusives that are expected in 2019, such as Crackdown 3, Ori and the Will of the Wisps, and more.If you need a refresher on either of the two newly-added games on Xbox Game Pass today, you can read our full reviews for Just Cause 3 and Ultimate Marvel vs Capcom 3.