Dreamcast was created on 1998-11-27.
Nov 27, 1998
Dreamcast Collection was created on 2011-02-22.
Sega.
Sega Corporation
There are no dreamcast emulators that will run dreamcast ROMs. The dreamcast is cd-based, so you can either download an emulator like Chankast, and use actual dreamcast CDs (you can get them for a couple of dollars/pounds) or download dreamcast ISOs
Japan: November 27, 1998US: September 9th, 1999
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The Dreamcast cannot emulate itself, however, it is possible to obtain a Dreamcast emulator for a PC. Various emulators, such as Chankast Alpha, exist.
No a Dreamcast game will not play on your computer but just putting the disc in there. You would have to play a dreamcast game on a dreamcast system.
Dreamcast Collection happened in 360.
Dreamcast BIOS dumps are not legally redistributable. You must dump them yourself from your own Dreamcast.
They can only play games that are designated for the dreamcast.
You only play Dreamcast games like Sonic Adventure on your Sega Dreamcast instead of Sega Saturn.