Rogue, Hack, NetHack TNG, PatchHack and SLASH'EM are all part of NetHack's family tree. Other roguelikes are not. We should have articles about each, to explain how they relate to NetHack (possibly many articles, if the relations are deep). But we shouldn't have articles like List of potions in Angband. Roguebasin is a better venue for that. An argument could be made for having some Tolkienish or D&Dish articles, as these are major influences on NetHack. Fan fiction, should it ever arise, is also appropriate.