SteamOS is essentially just a layer on top of Debian. It has Steam installed and some drivers, but underneath it's just Linux. OP is talking about about somethi

SteamOS is essentially just a layer on top of Debian. It has Steam installed and some drivers, but underneath it's just Linux. OP is talking about about something that is more dedicated to games. It could be a modified Linux or something from scratch, but it wouldn't just be a layer on top of something else.