PC NEWS: 188.8.131.52 update is out! More info here. Report bugs here
Journey's End on Xbox and PlayStation!: Get all the info by clicking here. A new patch is in QA - expect some Gamepad love, the return of Red's Pick and more.Click here for Known Issues and FAQ. For any other bugs, report them (with as much detail as possible) here.
MOBILE NEWS: Stay up to date with the latest mobile news here. Report mobile bugs here
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The current statement about crossplay is that it's not currently supported, but once all platforms are at the same version it will be explored by the team. However, they aren't guaranteeing that cross play will be added or if it's possible; just that they will look into it.
I'm afraid that we'd need the world file in order to get the seed, a screenshot is not nearly enough information. Even then, world gen changes from version to version so seeds from worlds in older versions are often no longer valid.
The current build is on discord only as it's meant for developers, not players.
If you are desperate, you could create a temporary discord account to get the code, then leave the server and close your account.