Can I upgrade a supporter pack bought on steam?

" prometteo14#2906 wrote: I can't find any info on this, but does someone know if I buy a supporter pack on steam, can I upgrade it to the next tiers in-game or here? even if those tiers are not listed on steam?

Hiya, you should be able to however if you have any issues with this feel free to send an email to [email protected] as we'd be happy to help.