Ultimate Mortal Kombat 3 (lost build of cancelled 3DO port of fighting game sequel; mid-1990s)
An advertisement in the game as seen in Electronic Gaming Monthly. Notably, the screencaps use a mix of Sega Saturn and SNES screenshots.
Mortal Kombat 3 (MK3) is the third entry in the Arcade line of Mortal Kombat games that were produced by Williams/Midway during the 1990s. The franchise is famous (and infamous) for its gore and "Fatality" mechanic.
Mortal Kombat 3 was wildly 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 has since been cancelled. However, remnants of its existence can still be found.
Work on the 3DO version has proven to be done, and it's likely that it was cancelled late into development.
A user by the name of "bitrate" on the AssemblerGames forums has both the source code and art assets to the 3DO port of UMK3.
While having ripped the art assets, it doesn't seem like they have shared the source code out to other users.
- Mortal Kombat X (lost builds of cancelled Xbox 360/Playstation 3 ports of fighting game sequel; 2015)
- Mortal Kombat Nitro Edition (lost updated port of "Mortal Kombat" for Super Nintendo; 1992-1993)
- Mortal Kombat 3 (lost build of cancelled Macintosh port of fighting game; 1995)
- Mortal Kombat HD Kollection (lost build of cancelled PlayStation 3 remake of fighting game collection; 2011)
- Mortal Kombat Devastation (lost movie script; 2004)
- Mortal Kombat Ultra Girls (Unreleased fully completed Mortal Kombat Television Series, 2021)
- Mortal Kombat X: Generations (lost production material for unreleased web series based on game franchise; 2015)