1997. The Saturn version was not displayed at the show, though Rebellion was still planning a release for the system at the time. A version for the Dreamcast was also in development but never released. An expansion pack titled Millennium Expansion Pack was released in 2000. It adds nine levels for single- and multiplayer, the ability to save within levels and new weapons for the marine. A compilation package titled Aliens Versus Predator: Gold Edition was also released in 2000. It contains the main game and the expansion. An Apple Macintosh version, for OS X and classical Mac OS, based on the Gold Edition was released by MacPlay in 2001. A version for Game Boy Advance was to be developed and published by Ubisoft, but eventually canceled. The mission briefings in the original version of the game were acted by professional actors, however, the development team felt that their acting didn't provide the sense of urgency required. New versions of the briefings were made for the gold edition featuring members of the team. Source code release In 2001, on end-of-support and end-of-life of the game, Rebellion Developments released the game's source code and tools to public to allow the game community further support of the game. Following the source code release, the game was unofficially ported to Linux and hosted at icculus.org in 2001, Xbox in 2009 and for PlayStation Vita in 2020. Also an unofficial patch project for the PC version exists, based on the source code. Re-release On 15 January 2010, after several years of unavailability, Aliens Versus Predator was commercially re-released under the title Aliens Versus Predator Classic 2000. This version of the game has been updated to work on modern computers, as well as support for the Xbox 360 controllers. Moreover, this release includes all the levels from the Gold Edition and the extra content of the Millennium Expansion Pack. Supporting only single player initially, multiplayer functionality has since been added. This release can be purchased either through Valve's Steam digital distribution service, through Green Man Gaming, or through GOG.com where it started as a free giveaway. A patch released on 19 January 2010 added proper widescreen support, optional unlimited saves, a locked frame rate, mouse improvements, and other updates to the game. At one point it was available through the now-defunct game streaming service OnLive. Reception Aliens Versus Predator received favorable reviews according to the