After yesterday's surprise addition offor Xbox Game Pass , it seems Microsoft is preparing another surprise. Four more titles have shown up in the recently added Game Pass section of the console dashboard in certain regions, although players are not yet able to install them. With a common spooky theme between them, there's a high possibility the games will be arriving just in time for Halloween.All of the titles are Xbox One games. Despite the spooky theme, only one is a survival horror title, with the four games instead all covering different genres. Without further ado, here are the games that look like they will be joining the program shortly:We don't yet have a release window for these titles, nor do we know if they'll be joined by any others. However, the Xbox Game Pass Twitter has been dropping hints as to when we might expect it. Their "Pumpkin patch" had reached 83% installation progress on October 16th. Today it sits at 92% installed. At that rate, we can expect the patch to reach 100% installation on Monday, October 22nd, so be sure to keep your eyes open for the new titles at the start of next week.In the meantime, don't forget that if you're currently playing any of these five titles , you need to finish them before their removal from the program at the end of October.