Steam Account Link Lost on Lost Factorio Account

[Sketchy_Art26]

Steam Account Link on wrong Account
So I have a friend who I bought factorio years ago. Recently we tried to play together but he doesn't have his old account that is linked to his steam. I also don't think he has the gmail account made with the factorio account anymore. What do I do to help him?

[Loewchen]

Contact support@factorio.com and include all information including proof of purchase, account names, email addresses, steam ID of the linked account and anything else you can think of helpful.

[Honktown]

He can also do the same for Steam: provide the bank/pay information, etc. Factorio's one game, his steam account probably had a bunch more right? Steam Support is generally helpful and responsive. If his account wasn't hacked, it's a lot more likely he's an honest user trying to get an old account back.