Ultimate Mortal Kombat 3 (lost build of cancelled 3DO port of fighting game sequel; mid-1990s)
Mortal Kombat 3 (MK3) is the third entry in the Arcade line of Mortal Kombat games that was produced by Williams/Midway during the 90s. The franchise is famous (and infamous) for its gore and "Fatality" mechanic. Mortal Kombat 3 was hotly popular at the time, so it only made sense that it was later updated in a version known as "Ultimate Mortal Kombat 3" (UMK3) that was later ported to many consoles, at the time including the Genesis, Sega Saturn, and SNES. A 3DO port was planned, but was since cancelled, yet remnants of its existence are around.
Work on the 3DO version has proven to be done, and it's very likely it was cancelled late into development.
bitrate on the AssemblerGames forums has both the source code and art assets to the 3DO port of UMK3. [1] [2] While having ripped the art assets, it doesn't seem like they have shared the source code out to other users.
Note for the creator of this page: There also exists an official UMK3 hat that supposedly Panasonic employees wore just to advertise the 3DO port of the game, but I cannot verify this.