: Many users locate the "Rev 1" or "V1.1" ROM for use with SNES emulators. Sources like the Internet Archive host archival copies of these files.
If your query refers to the arcade ROM set, Version 1.1 (Rev 1.1) is actually a very early "pre-production" or "initial release" build. This version is known for being extremely incomplete:
: While specific historical revisions aren't usually selectable, you can purchase the original trilogy (including MKII ) on platforms like GOG.com, which packages the DOS versions for modern PCs.
: This version featured significantly less blood compared to the final retail versions (Rev 2.1 or 3.1).