I've always thought that San Francisco is a beautiful city. I've also wondered why no sandbox games are set there. Sure, San Andreas has something resembling it and Crackdown is obviously inspired by it, but there's no games that actually take place in the city. I for one, would like to change that.
I don't have much of a plot yet, so for now I'll just put out bullet points.
- The PC is a cyborg- I've always liked the concept of a cyborg. The augs should be pretty obvious- it looks cool, and shows who and what the PC is.
- Mechanical monsters called "Jackals". Ten foot long black quadrupedal hunters with huge claws and more flexibility than seems possible. Nanotech, maybe? They also have hexagonal half-domes in place of heads. It's one big sensory organ- they can't sense anything else. It detects various forms of radiation (including visible light) and sound. The Jackals also have a very good sense of direction, and will not stop at any cost.
- Ooh! A revelation! The PC is an early cyborg, hence the appearance. The Jackals based off newer tech, which uses nanomachines to do most of the work. There should be big dudes with nanoaugs as well.
- The player should be able to move through the city very easily. Something a little like what games like Just Cause 2 and Prototype do. Some way for the player to get in the air quickly and easily. I also liked the building climbing of Assassin's Creed, The Saboteur, and Crackdown. Maybe have something like that, but more flashy and automated? Euphoria or another similar engine might be a good choice.