"Official" Game Server vs. Game Server for Steam Achievements?

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Brian Jordan asked Aug 22, '18

I saw this comment / solution in the Achievements not reaching Steam thread:

The solution to the non-communication of achievements was the Client/GS setting on the achievement itself.

There seems to be three options for achievements on the Steam side. They are (based on the docs):

Client - set by the client
GS (Game Server) - set by any game server (and it's possible to pretend to be a game server)
Official GS (Official Game Server) - similar to GS, but you define a comma separated list of IP address ranges in CIDR format

Is GS the preferred setting for compatibility with the AwardSteamAchievement API?

If Official GS is somehow preferable, would we need a list of IP ranges that our servers would be within?

apis sdks

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Answer 1 · 2018-08-30T00:21:04Z

Andy answered Aug 30, '18

As an update, all outgoing traffic from our main cloud now originates from one of three IP addresses:

That means you can now use the Official GS setting for Steam achievements if you whitelist those addresses.

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Answer 2 · 2018-08-23T00:13:53Z

Andy answered Aug 23, '18

Yes, we advise that you use GS. We can't provide a pre-configured set of server IP address ranges.

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