7.0
It's effectively one-third of a storyline that is a tutorial and stand-alone story for GBO2's gameplay without its "gotcha" elements, but at this moment, the game is effectively incomplete. Vol. 2 and Vol. 3 will be released within the next month. When it has the full storyline and set of units, it'll be a lot easier to make a determination about the entire package, but until that happens, you're better off waiting unless you're a huge Gundam fan who has to play this right away.
