Just as was the case with Gran Turismo 3 and 4, a Prologue edition will be released prior to the full game's introduction. These releases have always served as a teaser for the upcoming full game, though in the case of
Gran Turismo 5 Prologue, it'll also serve as a test for the online play. We're not sure to what extent the online features will be present, but they will in fact be included.
Gran Turismo 5 Prologue will play something like a mix between the Arcade and GT modes of past titles. Past Prologue releases have been largely focused on license tests, but that won't be the case here as GT5 Prologue will play more like the full game. A number of events will be present for you to race in, each garnering you some cash and a prize (presumably a car). Tuning will not be present, however, though it will of course be in the full release.