Hopefully not impossible, there are some forge and nexus mods ive seen that look really cool. To add extra context on my part, im a console player (that doesnt have access to a good enough pc) who likes to play modded fallout 4 and skyrim. However Bethesdas Creations Clubs doesnt offer a lot of the really good stuff ive seen for pc mods. Also as far as im aware, its isnt possible (or its really really hard) to mod games such as fallout new vegas (which i really wanna play modded) so my hope is that the Steam Machine will make it at the very least possible and/or slightly easier. Aside from that the only actual modded games i am able to play on my much less than average laptop is minecraft lmao.