Undead Nightmare not working after installation

You have not been scammed. Try uninstalling the game and dlc, and reinstall them again, see if that fixes the problem.

You should give us some more info regarding your issue. Do you have issues regarding accessing the dlc or the installation of it?

I’ve also tried reinstalling red dead redemption alone with undead nightmare still installed.

I tried reinstalling undead nightmare with red dead redemption still installed.

I tried reinstalling both.

None of these things work.

I know this post is very old but I was just having this exact same problem and I couldn't figure out what to do. Been having it for months now, every time I went on Red Dead and chose Multiplayer from the Main Menu, it would just load for a few seconds and
then I would be back at the dashboard??? I just tried Undead Nightmare Single Player as well and it did the same thing! No error message, nothing, it just acts like I've just signed in.

I looked for help everywhere and then I finally found this post. I have the game downloaded from Games on Demand and it has worked fine for ages. Once this started happening I just ignored it and moved on to another game, I thought perhaps it was just a
server problem but it's like still doing it??? So then I went on my HDD and saw I had two Undead Nightmare DLCs installed: Undead Nightmare Pack and Undead Nightmare v25 Pack. Both were 1.6GB. So I checked this out over the internet and found this page:

support.rockstargames.com/.../479645-crashing-on-360-after-re-downloading-undead-nightmare-and-then-launching-it-from-the-main-menu

So if you are having this problem, check on your HDD to see if you have the Undead Nightmare DLC installed twice. If you do then delete the normal one and keep the Undead Nightmare v25 Pack which is the latest one, then your game will work fine! Just thought
I will post this here just in case someone else ever has this problem!

Undead Nightmare was good but it got realy repetitive after a while.