: Because a CD only holds 700MB compared to a 1GB GD-ROM, "rippers" often had to downsample audio and video or remove "blank data" to fit games onto standard discs.

This is the sensitive section. However, we discuss the landscape.

No major commercial Dreamcast game is public domain. Copyright lasts 95+ years for corporate works in the US.

discs, which held roughly 1GB of data. Because standard PC disc drives cannot read original Dreamcast discs, you must use specific file formats tailored for either emulation or modified hardware. Common ROM File Formats

(Gigabyte Disc Read-Only Memory), which held roughly 1GB of data—more than a standard CD-ROM but less than a DVD [14]. File Formats

In the world of emulation, a "ROM" (Read-Only Memory) is a digital copy of a game's data. For the Dreamcast, these are more accurately "disc images" because the original games were stored on proprietary 1.2GB (Gigabyte Disc) optical discs developed by Yamaha.