Thaius said:
Hmm...no M rated games makes it a bit more difficult, but there are enough good stories throughout the medium's lifespan to bring up some good games.
My biggest recommendations are for KotOR I and II, especially if students are able to get the restored content mod for II. I is a great example of a plot twist, while II deals in some very interesting ideas(mainly through Kreia).
I agree with your use of FFVI, but disagree with using VII. X could still work, but it is also kind of basic. The twist is really cool, but if you're going to use a Final Fantasy game then VI or IV would be better choices.
It may be because I really enjoy Blizzard games, but I think the Warcraft series and Starcraft series have some good stories. Especially the changing perspective by having different races take the spotlight in each different story arc, and all the lore that the universes have. Plus Warcraft 3 and both Starcraft games would be pretty easy for students to get, so ease of access could easily throw it into the class.
The Jak and Daxter series shows some interesting story elements, and watching Jak corrupt through the series was very interesting. Ratchet and Clank or Sly Cooper could also work, really comes down to personal preference there.
I'm sure there are others that I could think of, but having some trouble right now. I'll make another post if I can think of more.
One question though: are you simply using game stories as they're presented or are alternate theories to the stories accepted? Because you could have a very interesting discussion in your class using FFVIII by comparing the presented story to the "Squall is Dead" theory.