Half-Life: Dreamcast will also feature an all-new single player mission that surrounds the Black Mesa Security Guard character, Barney. This special mission is being custom created for the Dreamcast by Gearbox Software, the Texas-based development team that created Half-Life: Opposing Force(tm), the official PC expansion for Half-Life and runner-up to 1999 Game of the Year by PC Gamer magazine (March 2000).

Also, Stomped has posted a Q&A with Randy Pitchford of GearBox about the announcement.