If you mean god mode (invincibility), enter the cheat code "cortosis". If you mean the costume, unlock all costumes with the cheat code "grandmoff" and pick and choose.
No.
Yes, it contains the original game
No.
ending a is to fight the emporer and die to become a jedi.ending b is to fight lord Vader and become a sith stalker
Yes, it is the same as the original game. the three bonus levels are separate from the story mode.
Star Wars The Force Unleashed - Ultimate Sith Edition - 2009 VG is rated/received certificates of: USA:T
Star Wars The Force Unleashed: Ultimate Sith Edition is available on disc. The game can be purchased both on disc and via digital download.
If you're thinking about the Sith Assassin armor, you get that by helping the Emperor by going fully over to the Dark Side and killing Lord Vader as revenge for his betrayal :)
yes
No
Sadly no
Well, Yeah.