That is an interesting question. An indie game for me has to be a small studio which isn't well known and has independant funding. Though, not sure how accurate that is.

Any title launching on a console that fans of the other consoles say doesn't count or is worthless.

OT: Seriously though it's difficult. Minecraft was an indie game... I didn't consider it that once it sold a bajillion copies though. It's really a combination of the budget behind it and the size of the team that's working on it.

Not really that hard to define:

An indie game is a game which is not released in retail.

Stike that... This is harder than I ever imagened.

For me: games that arent't funded by a publisher.

But yeah, it's almost like "hardcore"...

If the studio is independent and the games are "small", its what I call an indie game

Ratchet and Clank: Quest for Booty is an indie game? I never knew!

Wipeout HD? :O

A game made by a small studio.

I dunno. Dual Destinies is hardly indie.

That's probably my definition as well.

Something cheaply made by someone with a mustache and a fedora but doesn't count as an exclusive because it's ostensibly a piece of art, not a game.