Ashes Cricket and Pandemic will join the service on Wednesday August 1, as will Downwell for PC players.
On August 8, Jackbox Party Pack 2 will arrive for Xbox subscribers and Space Hulk Tactics will join the service for PC players.
Xbox One users will also gain access to Slay the Spire on August 14.
More details on the latest Game Pass titles can be found on Xbox Wire.
July’s Game Pass additions included Metal Gear Solid V: The Phantom Pain, The Banner Saga 3, Night Call and Resident Evil 4.
Xbox Game Pass Ultimate launched in June, combining Xbox Live Gold membership with Xbox Game Pass for console and PC.