The most famous feature of this ROM is the restoration of the original Bob-omb Battlefield layout. In the final game, the level is somewhat linear. In the E3 version:
A piece of gaming history has just been re-released for enthusiasts and preservationists alike. The ROM of Super Mario 64, as showcased at E3 1996, has been updated and made available for download.
This brings us to the keyword: Why would a historical prototype need an update ? Three reasons: