The Valve Editing Resource Center has uploaded the Blue Shift SDK that will allow those interested to create and edit levels for Gearbox Software's Half-Life follow-up that puts players in the role of a security guard at the Black Mesa research facility. Also, an update to Rick Overman's .plan has word from the GarageGames programmer that V12, the licensable version of the TRIBES 2 engine, will be sent off to Sierra in a day or two, following which it will enter duplication for distribution.