.hack//INFECTION (Part 1) (PlayStation 2, 2003)

It feels similar to playing an online game except not. I found this one pretty fun and a good introduction to the other 3 games making you want to keep playing them to get the story. You might also feel compelled to finish every little special feature. The dungeons can become a bit repetitive but I think that's pretty similar to an online game anyway. The animation is pretty good too considering this is a fairly old game now. Definitely give this game a try if you like convoluted plots, some repetition, and getting game goodies. ;D It's also got the great feature of being in either English or Japanese.