Expeditions: A MudRunner Game and Riders Republic are officially coming to Xbox Game Pass in September. Microsofts subscription service continues to be a tantalizing option for gamers who like to have a large selection of titles to choose from at any time. With three tiers, and a fourth on the way, Xbox Game Pass offers something for nearly everybody. Gamers who want it all can opt for an Ultimate membership; people who like variety but are leery of an expensive monthly subscription can go for Core.