I've always thought how well an open world Back to the Future game could be. Like you could get in the delorean, drive around Hill Valley and then time time travel to mess with the future or past. And in the case of messing with the past, then the future timelines would update based on actions you make.
Obviously it's get complicated really fast, and somehow you'd have to have some mechanic to make it so you can't interact with your past self. Maybe some sort of reset timeline mechanic would be needed if there were too many versions of yourself in a certain time?
This is amazing! I guess limiting the destination times makes sense. I was envisioning something like Majora's Mask where time would progress at an accelerated rate, and then you'd use the time travel mechanic to hop around.
This would mean that if you wanted to, you could age naturally from 1955 to 1985 if you wanted to, although it'd take a really long amount of time. This would require having more assets and time periods which didn't happen in the movies, but could open up more storylines.
I guess this would mean you'd need to also manage the age of your character, since you couldn't go to 1885 and live until 2015.