Well, that's a bit scary. Numerous reports about Reddit (compiled by GamesRadar) suggest that zombies appear in Red Dead Online. No, you read that correctly: Occasionally, pale, bright green-eyed, unplayable characters appear on the map.
The following example of reddit user groats_active is perhaps the most prominent find. If this woman is not a zombie, then she has a nasty case of malaria.
Players predict that these undead NPCs have been added with the latest update of the game and that Rockstar is planning some kind of big Halloween event. At this point, it certainly seems to be a logical conclusion, although there is also speculation that the supposed expansion we heard about last month could actually be Undead Nightmare 2 ̵
Rockstar remains secret. If these "zombies" are real and not an incredibly weird bug, then the developer certainly has something up their sleeves. We just have to wait and see if these undead sightings become more popular as we approach the scariest night of the year.