Uncharted 2 had 85 people working, while also using independent contractors for who knows what. Same time, Ubisoft had 500 people work on AC2. So it does depend on the business model and you're approach so to speak. Also, mind you, I did use some extreme conservative numbers. We all know GameStop doesn't make much of anything off of new games, and their main revenue comes from used games. Best Buy's cost per game is 50 dollars, and then make a profit by selling it for 60 dollars. So once again, assuming a game company makes 10 dollars per game sold is some really conservative numbers.
It all comes down to your business model, and like I said...some of these companies expect stupidly high expectations. Sometimes because they put a lot of money in development, marketing, or something else entirely. You don't need a AAA game to sell millions. There are plenty of indie or "B" games that can attest to that.
Which is why I see a lot of games adding in more DLC, multiplayer, or going strictly free 2 play this generation.
Take Tomb Raider for example - Its awesome. Seriously, if you haven't played it you should. It was amazing. And it sold pretty well (IMO). I think around 6 million copies. That's a lot (an estimated) and Square STILL thought that it didn't hit their intended projections to cover everything.
Now, even though there was multiplayer in it (it wasn't very good) so a lot of people sold the game back to gamestop and picked up another game (maybe Bioshock Infinite). So, Gamestop is right that by selling back Tomb Raider it 'helped the industry' by giving a consumer enough scratch to get B:I - but each subsequent sale of your old copy of Tomb Raider doesn't help Square at all - thus their saying that the game didn't 'sell to their expectations.'
Now, I hope we get more games of Tomb Raiders caliber. It looks great, it plays great, and it tells a wonderful story. It's obviously what the 'people' want too since it sold a lot of copies (not a crazy 20 million that CoD does, but 6 million isn't something to sneeze at).
But, we're in an industry that thinks 6 million new copies of a game isn't considered 'good.' I'd love to know how many additional sales it received through pre-own sales...
Cliff Blezinski already stated that the unique individuals playing games far exceed total sales. I'd love to know what the ratio is...
Video games don't have the luxury of reaping licensing deals like movies, tv, and the songs do. And it is hurting them...