Mutant Year Zero: Road to Eden is a stellar first game in what could be a great series. It’s available ‘free’ for those with a subscription to Xbox Game Pass, but it’s worth the price of admission regardless. A great intro to the tactical strategy genre that eschews the stats-heavy side of things to keep it fun.
No Man's Sky has come a long way from that humbling start for Hello Games. There could still be improvements to some gameplay systems and the user interface, but overall this is a greatly improved package that's brand new for most Xbox One gamers and well worth going back to for PC and PS4 players who dropped it shortly after launch.
What you’ll think of Sea of Thieves seems to depend on what you expected going in. Those that wanted a single player pirate adventure are bound to be disappointed by the relatively simple gameplay loop of going to find chests and returning to port with them, earning money to buy cosmetic rewards. Those looking for a multiplayer game with solo or co-operative play options are much more likely to be happy with what Sea of Thieves has to offer.
Metal Gear Survive is likely to see ongoing additions to improve it, and at this point I’d recommend waiting for some of those before jumping into it. Right now it’s a survival grind in the Metal Gear universe that’s more busywork than fun and it's only the gameplay carryover from Metal Gear Solid V that make it worth a look at all.