I remember like more than a decade ago, I played a weird and probably fan made game, the game is 3D. the setting is inside a manor like in mario 64. the decorations and character skins stuff have a lot of reference to Umineko (in fact i think this game is about Umineko). so basically this game spawns you and a bunch of other NPCs that looks like roblox/minecraft characters inside all at once. and each day you have to kill a target or prevent NPCs from getting killed, I wasn't really sure. the thing is the whole game was in japanese, I couldn't figure out what to do and the day kept resetting.
anyways i am getting nostalgic but also kind of fond of there eerie feeling i get when playing it. hope someone here knows what i am talking about.