System Shock 2

From the introduction: The year is 2114. Earth has been given the stars thanks to rapid advancements in space age technologies. The future has arrived. Partial Artificial Intelligences oversee massive science vessels as they explore the galaxy, robotic servants take care of the more menial tasks, and almost everyone is at least partially cybernetic. But the universe is not without its share of strife. And it still needs a strong military to lend stability to the far-flung pockets of Humanity.