When I select Slayer, there is no "Create New" option. Just the stock locked variants. Why is this so? I JUST downloaded P.C. last night, so it is all up to date.
I figured it out fam, go into settings from halo 2s main screen, game varients create new, name it zombies or infection. was so annoyed when i saw it and how non helpful people have been saying oh yeah just change the name.