As an update to the Rust situation, Facepunch have now changed their plans for the Linux version. They've decided to offer refunds, as they won't continue it at all.
Previously, their plan was to split the Linux version of Rust from Windows/Mac to at least give Linux owners a working game although without future feature updates. In the new blog post, written by Facepunch's Garry Newman, they "now realise how shit that would be" after talking to the community.
So they've decided refunds are a better option and to not continue the Linux client at all. However, you probably won't be able to refund it just yet. Newman said that Valve need to do some work first, to adjust the eligibility checking. Also "to guarantee that you'll show up as eligible I'd recommend you run Rust on Linux at least once right now" Newman said.
What are the refund rules for Rust when this comes into force?
- Should have played at least once on Linux
- Hours played are irrelevant
- We don't care if you've played on Windows too
Sometime around September 5th this will happen when they pull the plug, which Newman said another blog post will be up to let you know you can refund it.
On top of that, Newman suggested refunding it even if you think you have your monies worth, so you can "use that money to buy a game from a developer that supports Linux well - this is the best thing you can do to help your community".
As for Steam Play/Proton, they will not work against it however they also have no plans to support it and so it's "unsupported by us and could break at any time".
Newman also confirmed the Linux server will continue as normal, since that's how a lot of Rust servers are deployed.
See the full post about it here.