Recently bought X-Blades HD Gold, and Galaxy shown as "Unknown game"!

This might be a reflection of X-Blades being an embarrassing game to own.

Try restarting to refresh the cache.

I can't test it with Galaxy since I don't use it, but the game works fine when installed with the offline installer. I make no apologies. It is a genuinely fun game, if a little repetetive.

Yepp, it works fine through website, but not with galaxy. Goodies won't download either!

Tried to sign in/out, restart pc, nothing works!

Checked on other computer. Same results. The problem is not on my side!

Galaxy does that all of the time, with many games. It's probably not an X-Blades-specific issue at all.

Just have Galaxy Verify your game and it should correct the problem. That's fixed the same problem for me with countless games being displayed with "unknown version," which I assume is the thing your OP is talking about.

Okay, solution:

Shutdown GOG GALAXY (cogwheel icon →Exit), log into your account in a browser and then click these links
 
https://www.gog.com/user/refresh 
https://www.gog.com/account/refresh 
 
Afterwards restart GOG GALAXY and verify the list.

Say, what was the name of that cyber themed hockey game that took place in a tube?

I'm pretty sure there was a damage system too?

You mean Hyperblade? Activision published it, I think. I have the CD.

Yep. That's the one. Huh. I only ever had a demo that was probably based on a pre-release, so I had to double check.

I was about to ask if this was a re-release on GOG or its the game's first time here.