I have a completed game which I cannot archive and it won't go away from the list of my games. Been there at least a year I'd say.

1. Is it in your Inbox or only showing on your AllGames page?
2. What is the game number? Opponent name would be helpful too, you have a long list.

Just in my inbox.
Game I'd 14645362
Opponent Jarek Dwornik

That game appears to have ended normally in checkmate in 2021. If you still can't get it to move from Inbox to Archive you could try creating a Junk folder and moving it there.

I'll give it a go, thanks.

There's no option to archive the game, I'd move it if it were possible. I did create a junk folder anyway.

If you're using the app version, there may be a problem with the app. Try using the full webpage, go to My Games and select the AllGames folder. Does it have the Archive button on that game now?
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I searched the game by opponent name , there was an option to archive. I archived game, it came up "game archived". I thought great. But it's still there.