First time builder

This is a solid headlock build. I like the addition of Singularity so you can Eater remotes and the single Spooned to deal with Turing.

If I can offer some advice:

3x Xanadu might be too many. If you get it in your opening hand it's still 3 to play, which is a lot. It's better to draw into it when you've got some support from Kati Jones. Remember, ICE rezzing is almost always on your terms, not the corp's.

In its place should absolutely be Keyhole. If you are running Eater in Anarch, you should run Keyhole. This is a rather formulaic response, but I think it's true almost all the time, and this deck is no exception. If you can strangle the corp (which is one of the goals here), you can keep R&D ICE from getting rezzed and just Keyhole to your heart's content. It's a dirty way to win, but Anarchs play in the mud and love it.

I agree w/ all said by @FarCryFromHuman + I'd add a 3rd Parasite. I have also not found Hacktivist Meeting to be awesome enough to warrant 3 copies in a deck. Especially if you want to maximize your Vigil ability. If you really want a current I like Scrubbed for this build - IMHO. GL! =)

Yeah, I'll echo @FarCryFromHuman and @lroach2. You definitely want keyhole in here. I'd also like to see more economy. Here would be my suggestion:

I wouldn't play singletons of the traditional breakers, but would go "all in" on the eater/keyhole denial strategy. If this deck is working, then you are denying credits via Siphon/Vamp (and Same Old Thing helps keep those in play, along with Singularity). You aren't going to draw singletons with enough regularity to include them, and you aren't playing any tutors.

Scrubbers are great, but you have a lot of great/cute cards here. I would pack more economy, even more than the cuts above.

I played the Macho Man Reina for awhile and it was very good:

netrunnerdb.com

One last thing, if you are playing anarchs then I've Had Worse is probably better than Plascrete Carapace.

Good luck!

@Oisin @FarCryFromHuman @lroach2 I appreciate the feedback! Every piece of advice makes absolute sense. I'm sure it will do nothing but improve this build... but like @Oisin said should this be an all in eater keyhole deck?