yes

Yes even if they focus on one brand they could be pretty dang hardcore into it.

Yes, cause core gamer aren't defined by how many system they play games on

Yes. I consider them core gamers who are missing out.

These definition of core gaming threads are growing aren't they?

Well I'm Wii U/PC atm, so I'm not missing much.

People need to realize that not everyone has money to buy more than one console or medium on which to play their games. That doesn't necessarily mean they have any less of an interest in the games that they do own or rent (or pirate for all I know). So long as the person is a video games enthusiast and loves what he/she does enough to do it as a primary hobby, I'd say that person is part of the "core."

I think it doesn't really get much more 'core' than devoted PC-only gamers - in fact, in many cases it doesn't get much more hardcore even. So yeah, there's a single example that say yes, and I don't see any reason why the same couldn't hold true for other systems as well, although console gaming is a bit more casual... Hmm.

Let me put this in a way that even the lowliest of console gamers will understand. If you are not a member of the PC Master Race, then you are NOT a core gamer!

yes-if you can't afford another system

no,if you can afford but don't.than you are a fan boy playing games worshipping a company and refusing to play games just because they are not part of your god system.

From an objective point of view:
You can be a core gamer even if you have only one system and one game,as the number of systems or games says nothing about how much time you play and how good and ambitious you are.

Just like those guys who are only playing chess whole the time,for hours every day(the question here is:are they still core gamers when they only play real chess(professionals) or a chess computer or has it to be digital?)
or some starcraft or wow addicts who only play one game.

Yes - Even if you play smartphone games a lot > Core Gamer

Casual = someone who is playing only a few hours per week or less.
Core Gamer = someone who is playing a lot
Hardcore Gamer = someone who is playing even more and probably going for some World 1sts or something like that cause he has developed insane good skills at the game he plays without really competing in actual tournaments/winning money.
Progamer = A gamer who is earning money from sponsors or through winning tournaments.Probably Korean.
( i know you can make a lot of money with streaming but most of these people are just good entertainer or would fit into the hard(core) section)
Noob = someone who is new at a game.But mostly used for players who think they know stuff and are progamers but are worse than a cat.