It's basically Drive the video game. He's silent throughout the whole thing, basically has one friend, similar style in soundtrack and violence, same silver jacket, only difference is that he wears a helmet. Just my theory. It's fun though.
Well, it's set in an alternate reality, so it's not the 80s we know. In case you haven't found the secret ending yet and you don't wish to get it spoiled, I won't explain it. However, there is one that answers most questions, and it has to do with the letters.
but what of that story is real ? what did really happen ?
one of clerks is talking about a girlfriend before he rescues her. at some point hes seeing dead bodies talking to him. and when we play as biker jacket gets killed, not the biker.