Here's an interesting article I came across. Unfortunately, I don't have the source link:
Much more information is available about the sizes of games on the original Xbox. We were able to determine the sizes of all 34 titles launched with the system in 2001, most of the sizes for the top 80 games - according to GameRankings.com - released in 2002 and 2003, respectively, and about half the top games released in 2005.
To start with, the original Xbox also uses DVD9s to store data, just like the Xbox 360. It's important to note not only the size of the games, but the percentage of space taken up by the average title.
What you find is this:
- Average for 2001: 1.81 gigs (21% of disc)
- Average for 2002: 2.17 gigs (25% of disc)
- Average for 2003: 2.47 gigs (29% of disc)
- Average for 2005: 3.20 gigs (37% of disc)
The largest known U.S. released Xbox game on our list was RalliSport Challenge 2 (released in May of 2004) at 6.19 gigs, and used 72% of the Xbox DVD9 capacity. On the list of games released for the Xbox that we were able to identify sizes for, only 26 out of over nearly 800 games used more than half of the DVD9 capacity. That's about 3% of Xbox titles.
How Big are the Xbox 360 Launch Titles?:
To start, we need to know how big the Xbox 360 launch titles are. How much space are early games taking up, and how much room do they have to grow?
A few weeks ago, the Xbox 360 modding community figured out a way to pull raw data dumps from the Xbox 360 discs, giving the scene access to their raw sizes. Unfortunately, we don't have the data for every game in the launch line-up; in fact, we only have the data from 4, which is hardly statistically representative. Still, we work with what we have.
These are the sizes that we know:
- Condemned: 3.9 GB
- Madden 06 NFL: 3.3 GB
- Dead or Alive 4: 5 GB
- NBA 06: 4.5 GB
Final Conclusions:
Much debate has gone into whether or not the DVD9 format is too small for next generation titles. Looking over the data, it's fairly evident that in fact DVD9 is not too small for next generation games as much as it was too big for the last generation's. Very few games on the original Xbox came close to pushing the limits of the DVD9 format, leaving plenty of room for growth for the Xbox 360.
Undoubtedly, games will grow. However, technology designed to keep them small and compact will grow as well. In many ways, the debate over Microsoft's handling of the DVD9 and HDDVD formats is simply a matter of a red herring. People see it and worry about it, but there is little data to suggest there will actually be a problem with it.

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