I just passed the wholle story I don't think that I unlocked everything so sorry.
P.S.:
Try unlocking by playing, not cheating, trust me it's a lot of fun
Don't post here if you unable to provide a save game for us with all campaign complete because I already lost a save game file due to reformat and don't want play over again.
I found one but without GFWL profile so I hate GFWL at all. *hammer on M$*
i did unlock almost all costumes and weapons only a little missing, but when i gave my save game to my friend the first problem we encounter was he wasnt able to use the lan mode anymore im afraid sharing save game will not help in this game or i would upload mine
Well, only shared saves will work for single player, just play in offline mode.
When you upload the saves, also make sure if Xlive profile is included too.
You can find Xlive profile: Computer/C:/Users/"Your username"/AppData/Local/Microsoft/Xlive then copy all into single folder.