Brute Force is a third person shooter released for the Xbox in 2003. It was developed by Digital Anvil, one of Microsoft’s internal developers. The team had previously worked on games such as Wing Commander, Strike Commander, and Starlancer. Brute Force was designed to be a first-party game for the Xbox and begun in 1999 / 2000, before the console had launched. However development had begun before the takeover of Digital Anvil by Microsoft, and the title was originally meant for PC. Microsoft promptly turned it into an Xbox exclusive title. Only three months were spent on the concept stage of development, but would spend the next two years on the prototype cycle of development. Brute Force has the distinction of being the last game developed by Digital Anvil, as the studio was closed down officially on January 31, 2006. The staff was integrated in to Microsoft Games Studio in Redmond. [Infos from Wikipedia]
In the video below we can see a comparison between the final character design and some of the early prototypes.