I don't advise making multiple channels. Put everything on one channel and organise it with playlists etc. I think its a stupid idea to make multiple channels until you have one overly large channel and want to make videos that have nothing to do with what goes on on your main channel.
I will put the PC and mobile games in you Gamerster Channel becuse like Breezy says its stupid make different channel for PC and Mobile and I will tell you should do Mobile and PC games if you enjoy them and goodluck on those videos and btw alot of mobile games are harder to get views and subs then PC games so good luck mate!
I would highly recommend keeping them on the same channel. Mobile gaming and PC gaming are both still GAMING. You should really focus on growing your audience on one main gaming channel.