Is Alpha Zombies Not a Custom Game Option for Reach?

I recently just made an infection map for me and my friends to play on and I went into the gametypes to pick Alpha Zombies as that’s the one we prefer to play, and for some reason Alpha Zombies isn’t there to be selected. For some reason you can only choose normal infection and safe havens.

Am I missing something, did my game glitch or is it just flat out not available as a custom mode? If it’s not available that’s just plain stupid and I ask why isn’t it when it was in the original, not to mention it’s also in MP so it’s in the game. I’ve tried tweaking the normal mode but the best I can do is make all the zombies have unlimited sprint or all just normal sprint.

It exists. Are you on PC or Xbox?

It might be that you have to find it and download it. Reach has extra scripting options built into the gametypes themselves. It uses this built-in coding language to make the alpha zombies mode. I’m surprised it doesn’t come with the game tbh. I would assume that any map that works with other infection gametypes would also work with Alpha Zombies.