Short answers, pulled from the story.
The Dreamcast launched in Japan on the 27th of November 1998, and worldwide in late 1999. Sega announced its discontinuation on the 31st of January 2001, with production ending after the 31st of March 2001.
9.13 million Dreamcast units were sold worldwide. Over 600 games were produced for the system across all regions.
The Dreamcast's failure has been attributed to consumer anticipation for Sony's PlayStation 2, the loss of support from Electronic Arts and Squaresoft, disagreements among Sega executives, and damage to Sega's reputation from the earlier failures of the Saturn, 32X, and Sega CD. Sega also lacked sufficient advertising funds and struggled to build an installed base large enough to sustain the platform.
The Dreamcast was the first home console to include a built-in modem for internet access and online play. It pioneered concepts such as online multiplayer, downloadable content, in-game voice chat, and second-screen technology through its VMU memory card, which featured a small LCD screen.
Sega held a public competition drawing more than 5,000 entries to name the console. According to Katsutoshi Eguchi, Japanese developer Kenji Eno submitted the winning name, a portmanteau of "dream" and "broadcast," and created the spiral logo, though Sega never officially confirmed this. Former executive Kunihisa Ueno stated in his biography that branding agency Interbrand created the logo.
Sonic Adventure, developed by Sonic Team and released in 1998, is the best-selling Dreamcast game with 2.5 million copies sold. It was also the first fully three-dimensional platform game starring Sonic the Hedgehog.
The Dreamcast remains popular in the video game homebrew community. As of 2026, hobbyists have restored online functions for more than 50 Dreamcast games by developing private servers after Sega shut down its official network.