Here comes the chance if you want to play OSRS on Steam. From Dec. 7th, there is a chance to participate in OSRS Steam Beta if you want.

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OSRS Steam Beta released on Dec. 7th

According to the latest Steam Beta Announcement official blog, a Closed Beta test for OSRS on Steam is released on December 7th. The Beta will be conducted through Steam. There isn't yet an end date for this beta test.
Notice: At this stage the beta is Windows only.

How to participate in OSRS Steam Beta?

To participate in this beta, you can sign up by registering your interest on https://osrs.game/ClientBeta. If you are chosen, you will be sent an email containing a Steam key and instructions.
Logging in with the client on Steam will link your Steam account to a RS account. Only one game account can be linked with your Steam account. If you want to play using another account, you will need to unlink your Steam account. When you first launch the client with Steam you will be prompted to either log in with an existing game account or create a new game account. Whichever option you choose will result in the game account being linked with your Steam account.

Are you looking forward to playing OSRS on Steam?

Anyway, a long-term 5% off code "RSYK5" is also offered from https://www.rsorder.com/. And in the following days there will be a bunch of Christmas gifts from RSorder. Learn details from https://www.rsorder.com/merry-christmas.