No it is not possible because you have to connect to Xbox LIVE each time. I was reading about this on a different website, and most of the guys on the site were ModDev's, and they said it may be awhile before you can mod Spartan Ops. I believe it may be possible with an RGH/JTAG, but am not 100%. Until someone can decrypt it so Spartan Ops can read off the disc, rather than Xbox it will be impossible. I'm just curious though, why would you want to mod Spartan Ops? It's not like you have limited lives on it, or you reset after a certain number of deaths. I just don't see the point in God Mode on this.