So I just bought the game and used the Factorio upgrade code on my portable. Everything works great. But...
When I get home and try to download to play on my home pc, it says that upgrade code is no longer valid. Do you need to purchase a version for each machine, I use Windows, Mac, and Linux machines depending where I am and what I am doing, I hope I do not need multiple upgrade codes ?
Question on Factorio upgrade code
Re: Question on Factorio upgrade code
no you don't. 
I move this to technical help.

I move this to technical help.
Cool suggestion: Eatable MOUSE-pointers.
Have you used the Advanced Search today?
Need help, question? FAQ - Wiki - Forum help
I still like small signatures...
Have you used the Advanced Search today?
Need help, question? FAQ - Wiki - Forum help
I still like small signatures...
Re: Question on Factorio upgrade code
You only need to enter the upgrade code once, which I guess you received by e-mail.
After that, your account is upgraded and you can download the game on any machine.
If not, please write to support@factorio.com.
After that, your account is upgraded and you can download the game on any machine.
If not, please write to support@factorio.com.