Half a dozen titles spanning a fairly wide variety of genres are scheduled to leave Xbox Game Pass later today, September 15.

Microsoft has officially rolled out Game Pass Standard, the Netflix-like subscription service’s new middle tier, and with it revealed which games will and won’t be included at the start. Among those missing are Call of Duty: Modern Warfare 3,

There is another caveat, that Microsoft has seemingly arbitrarily picked a few dozen games, many of them big titles, that are not included in Xbox Game Pass Standard,

Xbox Game Pass has long been the key differentiator for Microsoft's gaming business, offering an alternative subscription-based store against Steam on PC, and offering heaps of value on console against PlayStation with its day-one games pledge. That covenant has been undone now, though.

First, the new tier and price changes. As of yesterday, there is a new tier of Xbox Game Pass called the "Standard" tier. This is replacing the previous standard tier of Xbox Game Pass on console. The difference is this new tier won't include day one games. These games may be added eventually, but there is no promise of this and no day one.

Xbox officially launched its new Game Pass Standard plan on Tuesday, but it's missing some huge first-party titles.The Latest Tech News, Delivered to Your Inbox

Microsoft has overhauled Xbox Game Pass, so here’s what to know about each of the service’s four tiers and which one offers the best value.