https://wccftech.com/ori-and-the-will-of-the-wisps-file-size-achievements/

Microsoft and Moon Studios’ Ori and the Will of the Wisps is less than a week away, which means pre-loading is now available and the game’s achievement list has been revealed. So, how big is the Ori download? Pretty small by modern standards – according to the Ori preload page, you’ll need 10.5GB of free space, although those who have preloaded the game are reporting the game is closer to 6GB. Of course, there may be some sort of day one patch that increases the game’s file size. Either way, you probably won’t have to clear any disc space to download this one.

Meanwhile, here’s the full Ori and the Will of the Wisps achievement list: