The First 15 Minutes of Quake III Arena (Dreamcast)

Copied from Sega Retro:

Quake III Arena is a first person shooter and a direct sequel to Quake II. It was developed by id Software and ported to a variety of systems, including the Sega Dreamcast (whose port was handled by Raster Productions). The last game in this franchise to appear on a Sega system was Quake on the Sega Saturn.

Quake III differs from previous installments in the series in that the game is focused on multiplayer matches. The technology and simplicity of Quake III made the game extremely popular, so much so that many people still play the game online today, despite the game being over a decade old. It is one of the few Dreamcast games which can still be played online due to fan servers.