Online games rely on the internet (Runescape, WoW, Minecraft, etc or even sites like omgpop)
PC games may include a multiplayer option but don't rely on the internet to access the game (Call of duty, GTA, etc)
It's fairly obvious what the difference is, especially if the prefixes are put in then when making a thread you'd look and see and be able to notice the difference.
I think it's better to keep them seperated as they're very different and each still has an interest.
---------- Post added 06-01-2013 at 01:14 PM ----------
@Chris; make this happen pls