I just think hardcore gamers are people who play a ton of games and take gaming very seriously. To me it doesn't matter much what they play, other than it has to be more than simple games like Angry Birds.
If someone is gaming on consoles or PCs and playing full fledged games a ton, and it's their main use of their free time, then they're a hard core gamer.
A casual is someone who plays games, but it isn't their main hobby.
But of course there are matters of degree in how hardcore or casual someone is, but that's just the nature of trying to lump people into two broad categories. It's never a perfect fit for everyone.
If someone is gaming on consoles or PCs and playing full fledged games a ton, and it's their main use of their free time, then they're a hard core gamer.
A casual is someone who plays games, but it isn't their main hobby.
But of course there are matters of degree in how hardcore or casual someone is, but that's just the nature of trying to lump people into two broad categories. It's never a perfect fit for everyone.