What are the most prolific months to release games in terms of that game reaching 1m+ sold WW

 Of course November, but outside of november. here is how many games have been released in each month that have gone on to sell 1m.

Jan - 1

Lost Planet 

Feb -3

Crackdown 

FNR 3 

PES 6 

Mar - 3

Oblivion 

GRAW 1 , 2

Apr - 1

Guitar Hero II 

May -1

Forza 2 

Jun - 0

Jul - 0

Aug - 5

Bioshock

Madden 07, 08

Dead Rising 

Saints Row 

Sep - 1

Halo 3 

Oct - 4

Guitar Hero III 

Marvel - Ultimate Alliance 

NFS - Carbon 

Splinter Cell - Double Agent 

Nov - 10

GOW 

CAll Of Duty 2, 3, 4

Assasins Creed

Mass Effect 

NFS - Most Wanted 

Perfect Dark Zero

Project Gotham 3 

Rainbow 6 - Vegas 

Dec - 1

DOA 4 

 Total - 30

As you can see November doubles the second biggest month with 10, August having 5 and October 3rd with 4 , March and Feb at 4th having 3 a piece.

 June and July are the only two months to not have a game released reach 1 mil+

December is expectedly lower than November as most releases take place in November; August is kinda surprising, though (even without Maddens, we have 3 million sellers)...

The issue with December is that very, very few critically acclaimed games come out this month. Look at any chart: developers tend to try to release just before Black Friday to get the optimal sales. Consumers, by black Friday, are ready to buy the hottest games. Not only this, the closer they are, the more "important" these games are to consumers in December, as they are fresh in their minds.

A great example is this week: only 1 game in the top 50 was released this week: DBZ for the Wii, with a paltry 25,000 units sold. This is despite the fact that the same DBZ game on PS2 is already at 10x the sales, but only 4 weeks old.

Also, only 4 new games were in the top 100. That's absolutely horrible. Which goes to show you why things debut the way that they do.

Now, having said this, Japan obviously isn't this way: they debut alot of big games in December. Last year, Blue Dragon, Yakuza 2, and some Gundam games were released in December. So it's only an American thing for the most part.