we had a thread about this years back IIRC, but considering I can't find it (search still seems to be broken), and reviving it would have been seriously Necroing at this point, i thought I would start up another
for those not familiar with the terms:
a Linear Continuity is a series where you really have to play the previous game(s) in the series to fully understand whats going on, who the characters are, and what the overarching plot is.. games like Assassin's Creed (up until the end of 3 anyways..) or Mass Effect would fall into this category..
an Episodic-Linear Continuity refers to a series where all the games take place in the same world with a few overarching plot points or characters, but you really don't have to play the previous titles because each is its own self contained story, although you may see small references to the previous titles as you play.. games like The Elder Scrolls or Might & Magic would fall under this category..
a Purely Episodic series is a series where, other than having a very similar name, the games all take place in entirely separate universes that may just share similarities.. off the top of my head, Final Fantasy would fall into this category..