Markiplier!OlderBrother x Reader!YoungerSibling end up in a apocalyptic world based on a video game Mark had once played.
(F/N) = First Name
(L/N) = Last Name
(E/C) = Eye Color
(H/C) = Hair Color
P.s, really sorry on the gender thing if you're not a girl, I try to make these gender neutral but I just didn't know how to write this one any other way.