bleemcast! for Tekken 3
The bleem! company made some incredible single-game emulators so if you wanted to play Tekken 3 on your Dreamcast but couldn’t since it never came out for it, you could take this disc, put it in first, and then swap it with the Playstation game when your Dreamcast would become a Playstation emulator. Neat tech, and relatively rare because Sony kept suing bleem! until they went out of business.