Free Play Days is back once again, offering Xbox Game Pass Ultimate and Xbox Live Gold subscribers four games they can play for free this weekend, including Cities: Skylines. Cities: Skylines, WRC Generations, and Dead by Daylight can all be played now for free up until Monday, March 13th (Rainbow Six Siege is available until the 16th), if you're subscribed to Xbox Game Pass Ultimate or Gold. For other free-to-play games that aren't limited to just the weekend, check out our best free Xbox games article. Cities: Skylines https://www.youtube.com/watch?v=PKGAbhGuQu4 Cities: Skylines - Xbox One Edition Rainbow Six Siege https://www.youtube.com/watch?v=7-kUHQYGIbc Tom Clancy's Rainbow Six® Siege Deluxe Edition WRC Generations https://www.youtube.com/watch?v=2nRUwDtP6s4 WRC Generations - The FIA WRC Official Game Dead by Daylight https://www.youtube.com/watch?v=4iRwVVPJ8sk Dead by Daylight Cities: Skylines, Dead by Daylight, and Tom Clancy's Rainbow Six Siege are all included with Game Pass, so Ultimate subscribers may want to give these a miss this weekend. All three games here have long completion times, so just be aware of those if you do decide to play any of them this weekend. WRC Generations has a much more manageable completion estimate of 40-50 hours. Could you do that over the next four days? Probably. Would you want to? Probably not. All four of these games are now free-to-play with Free Play Days and have been discounted on the Xbox Store. Will you be playing any of these games this weekend? Let us know in the comments!