has an "evil genius" theme with archetypical spy fortresses, concealed within inconspicuous buildings such as industrial warehouses and farms to give plausibility to their close proximities; these bases are usually separated by a neutrally themed space. The bases hide exaggerated super weapons such as laser cannons, nuclear warheads, and missile launch facilities, taking the role of objectives. The maps have little visual clutter and stylized, almost impressionistic modeling, to allow enemies to be spotted more easily. The impressionistic design approach also affects textures, which are based on photos that are filtered and improved by hand, giving them a tactile quality and giving Team Fortress 2 its distinct look. The bases are designed to let players immediately know where they are. RED bases use warm colors, natural materials, and angular shapes, while BLU bases use cool colors, industrial materials, and orthogonal shapes. During the July 2006 Electronic Arts press conference, Valve revealed that Team Fortress 2 would ship as the multiplayer component of The Orange Box. A conference trailer showcasing all nine of the classes demonstrated for the first time the game's whimsical new visual style. Managing director of Valve Gabe Newell said that the company's goal was to create "the best looking and best-playing class-based multiplayer game". A beta release of the entire game was made on Steam on September 17, 2007, for customers who had pre-purchased The Orange Box, who had activated their Black Box coupon, which was included with the ATI HD 2900XT Graphics cards, and for members of Valve's Cyber Café Program. The beta continued until the game's final release. The game was released on October 10, 2007, both as a standalone product via Steam and at retail stores as part of The Orange Box compilation pack, priced at each gaming platform's recommended retail price. The Orange Box also contains Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, and Portal. Valve offered The Orange Box at a ten percent discount for those who pre-purchased it via Steam before the October 10 release, as well as the opportunity to participate in the beta test. Post-release Since the release of Team Fortress 2, Valve has continually released free updates and patches through Steam for Windows, OS X, and Linux users; though most patches are used for improving the reliability of the software or to tweak gameplay changes, several patches have been used to introduce new features and