Walkthrough is not easy, but there have some tips:
Don't kill anyone. Don't arrest anyone.
Mr.Burke route: don't pay the money, do what he say (first day you can "arrogant and rude".
(It seems that get pregnant can get the beach sex with Mr.Burke at the beach)
Micheal route: relationship with Micheal at first day(can get more scene!?)
J.Blue route: first day, Win J.Blue , then arrest him, and accept the 5,000 money.[open J.Blue route)
Mason route:
arrest him when he first appear, win 2 times then choose Surrender.
win he when he second appear, and choose "safety switch ON"
I think another route is easy to open.
P.S. who know how to open "HELL_STREET" scene....about LUCIFER.........