Back in the old days, Microsoft capped the size of Xbox Live Arcade games at 50 MB. I’m not particularly sure why they choose that cap, but they did. Then Symphony of the Night broke the 50 MB limit, so they raised it to 150 MB. Then Portal: Still Alive broke that at 1 GB. Since then, the file cap hasn’t really been enforced, and IGN reports they’ve ditched the cap all together. That doesn’t mean XBLA downloads can be much bigger, however. Microsoft’s Scott Austin says there is a 2 GB hard cap due to the file structure of XBLA games. So why the 50 MB cap in the beginning?