Tom Clancy's Rainbow Six is a tactical shooter computer game and the first in the Rainbow Six series. It was developed and published by Red Storm Entertainment for the PC in 1998. It was later ported to Mac OS, Nintendo 64, PlayStation, Dreamcast and Game Boy Color. An expansion pack, Tom Clancy's Rainbow Six Mission Pack: Eagle Watch, was released on January 31, 1999. The PC version is available for purchase on GOG.com, while the PlayStation version is now available for download from the PlayStation Store.