The kill announcement picked Running Riot whenever the killer's kills in a
row were a multiple of five, and zero is one. On the Xbox the killer had
just been credited with the kill, so it was never zero; a network client's
copy of the statistics can have the kill credited to no one or to someone
else until the host's statistics arrive, and announced Running Riot after
one or two kills.
A killer with no kills in a row now gets the plain kill message.
(cherry picked from commit 1b6cf950532f6d9590690c86c253def5395a132f)
Milenko
2223f94579