.hack//Infection, //Mutation, //Outbreak, and //Quarantine were some of my favorite PS2 games. Good times, good memories!
The whole .hack// Franchise remains to be a highlight of anime in general for me, despite the run-on plot that keeps being redone, and the holes in the plot, and whatever else that could possibly bring it down. It was one of the first series I got into with a friend, and we've appreciated the first four games and .hack//Sign (the preceding anime) very much over the years.
(A little off topic, but said friend and her sister just cosplayed Elk and Tsukasa at Youmacon this past weekend!
)