The folks behind the Xbox Game Pass Twitter account are once again up to their old tricks and are teasing the return of a fan favourite to the Xbox Game Pass library. https://twitter.com/XboxGamePass/status/1345414622019420161 The Xbox Game Pass Twitter account uploaded an image of a fake email from Melissa McGamepass. The email teases an addition that "everyone was happy" about when it joined the service but left players sad when it was removed. This is pretty vague and could relate to pretty much any game that's dropped out of Game Pass, but some users on Twitter believe either Red Dead Redemption 2 or Grand Theft Auto V, both of which only featured in Game Pass for a few months, could be returning. Others are suggesting that Fallout 4 could be rejoining the service, which makes sense considering Microsoft entered into an agreement to acquire Bethesda last year. The email also talks about The Medium coming to Xbox Series X|S, PC, and Game Pass on day one later this month and mentions that the Cloud Gaming library is set to expand. We'll likely hear about what this mysterious returning game is at some point this week, but what do you think Microsoft is teasing? Let us know your thoughts in the comments below. Microsoft also announced that four games will be leaving Xbox Game Pass in mid-January.