So we are looking into the following (And may have something available as early as this week):

1. If you bought GalCiv IV on Epic and want to get Supernova on Steam, we are looking at a way to enter in your info at GalCiv4.com and providing a Supernova only pricing to get it on Steam.

2. If you already bought GalCiv IV: Supernova on Epic, you would enter your details on GalCiv4.com and you would get a Steam key (free).

3. If you bought GalCiv IV: Supernova on Steam and want to transfer to Epic, that is something we might be able to do as well.

*Personally* speaking, back when Stardock had Impulse, we tried to implement "universal" keys into what we called Impulse::Reactor (Some of you may recall this). This was intended to try to make the stores more competitive with each other but obviously after GameStop bought Impulse they didn't pursue that.