The Elder Scrolls. I only played Morrowind, Obivion and Skyrim, but I played those a
lot, and I did a lot of reading, both in-game and on wikis, about the lore of the series, so I am at the point where I would very well call myself an expert in that regard (silly as it might sound
).
I am also pretty good with the Fallout series (played all games at least four times save for Fallout 3), Kotor II (I played that game like eight times even before the restoration patch and know every nook and cranny of it), Final Fantasy VIII (I once wrote a guide for it detailing how to get Squall's ultimate weapon in the first disk with 255 strength, including lots of card-game and grinding) and the Prince of Persia series (my friend was really into them at one point and we had this self-imposed challenge of going through the entire series without getting hit once. he actually did it, I only got close, but I still think it is a pretty good achievement).
If I would have to say, the games I really get into and get the technicals down are generally the ones that I can break. I just like it when, through careful planning and unorthodox tricks, I can cheat the game's own system and break its balance. There's just something oddly satisfying about that.
