If we talk that are AAA games, there are games that are not AAA. What classifications and examples for each category?

If theres AAA, there must be AA, b, c, and so on.

There is AAA, AA, A and then "indie". Those are the only ones I've seen being used anyway.

Indie has nothing to do with a game's budget though. I'd say AAA, AA, and just A is correct.

So how much is each A worth?

I completely agree, and that's why I had the "s around indie. I don't like the term indie being used to describe budget, however it often is used in that fashion, so I chose to include it, but with "s.

Indie means one thing only: it was developed by an independent studio. The problem is, everybody that has ever coded a basic "hello world" thinks they should be able to make a game. Indie has come to be interpreted as very low budget exactly because the vast, vast majority of indie titles are made by a single person or a small group on little to no budget in a short time period, usually with quality reflecting that fact.

Generally speaking, most quality indie titles fall in the realm of A, like Bastion or Transistor. The thing is, so many indies aren't even A quality that they've basically earned their own classification on every level.

As for AAA, AA, and A, for the most part, they're relatively BS labels that we use so that we can insist on the fact that particular games were a waste of money, and that other games are so good despite their lower budgets. It's something mostly used for list wars, and is completely and utterly useless otherwise, especially since the labeling is always a vague, subjective combination of IP popularity and assumed budget.

Does anyone actually refer to "AA" or "A" games? Never seen it.

Only sometimes. People get far more focused on AAA titles because anything less is clearly niche because list wars.

Id say A= around 10 million. AA= around 40 million and AAA= 80 million or more. Anything lower than 10 million would just be considered low budget.

A lot of average JRPGs are referred to as AA