According to importer YesAsia, the PlayStation 3 version of Soulcalibur IV will join the ranks of games requiring a substantial installation to the console's hard drive. How substantial? Substantial. About 6.5 GB worth of your HDD, with 2 GB of space on top of that allocated to save data. The latter disk space requirement makes some sense, as the game looks to have a fairly robust character creation tool, which we hope allows for a larger number of custom fighters than its predecessor. Regardless, 2 GB, if true, is still rather hefty.
Xbox 360 fans may also be in hard drive requirement heaven, as the official Xbox site indicates that Soulcalibur IV requires a hard drive to play. This could have huge implications if... wait, who doesn't have an Xbox 360 with a hard drive by now?
We've contacted Namco Bandai Games to verify this information, but have yet to hear back.
update
So it looks like the good folks over at Microsoft messed up. The page has now been updated to reflect the fact that the game actually doesn't need a hard drive