The DreamOn series is a set of demo discs for the Sega Dreamcast, distributed in parts of Europe. They can be seen as a successor to the Sega Flash series for the Sega Saturn, as like the Sega Flash series, each disc contains a number of playable demos and watchable videos of upcoming video games.

Dream On Volume 18 is a Sega Dreamcast demo disc distributed in Europe as part of the Dream On series. It was sold with issue #17 of the UK's Official Dreamcast Magazine, issue #x of Dreamcast: Le Magazine Officiel, issue #12 of Dreamcast Kult and issue #15 of Revista Oficial Dreamcast.

Playable Demos :
- Dave Mirra Freestyle BMX
- Ducati World
- Sega Extreme Sports
- Virtua Tennis

Videos :
- Fighting Vipers 2
- Le Mans 24 Hours