My favorite three fan games are:
Corpse party cross fear(because it showed the most likely scenario for a survivor of the school);
Corpse Party if PAST END (because it seemed the closest to the style of corpse party blood covered and i loved that)
Corpse Party Rebuilded (mostly because it seem like a good modernization without ruining the original)
And keep in mind i've never played these games, this opinion was based on what i've seen in playthroughs of these games.
Whether by Windblast or by choke hold, whether by the steel of my Folding Blade or the swiftness of Blink, whether by Possession or by the power of thine Pistol, none shall evade either my Wrath, or my Mercy. For the Outsider gazes from his Void, the fate of all, are in the hands of those, marked by him.