None of my friends play games, and nobody on my Xbox friends list plays Halo. So, can I go full foreveralone when I play Spartan Ops, or do I have to play with randoms online?
You can play it solo to your hearts desire!
Yes.
Pretty sure you can play solo but you could also add people here to play halo with.
You can play alone, seeing on how there is an achievement in Halo 4 for beating a spops mission alone on Legendary.
Yes you can. Luckily I have some friends who I can play it with. That’s more fun.
Not trying to say you’re forever alone OP.
You can both play SO alone or use Matchmaking to play with a full team if your Friends don’t play Halo or SO.
Just post on here when ya can and you will find many who will play with ya.
I’m in your same position. I’m gonna play foreveralone spartan ops too. Although it is available for matchmaking.
yup. solo you can play 
Thanks for the info everyone, good to hear that.
to tell you the truth. i think it should be interesting.
Anyone know if you can play Spartan Ops with a guest? Or does it have to be with another Xbox Live account?
I’m going to try it solo on legandary.
Here’s a question that I have yet to see answered (meaning if it has been answered, I haven’t seen it yet;) will all Spartan Ops mission be saved to the harddrive for play offline as well as on?
> Anyone know if you can play Spartan Ops with a guest? Or does it have to be with another Xbox Live account?
Yes.
> Here’s a question that I have yet to see answered (meaning if it has been answered, I haven’t seen it yet;) will all Spartan Ops mission be saved to the harddrive for play offline as well as on?
This is unknown, but the mandatory 8GB hard drive space may mean this will be possible.
Time will tell.