This is the developer group for Nazi Zombies Portable.
I had the same problems downloading at first, but i finally got nzp on my psp. I have a really old psp, so most downloads don't work on my psp. If you are having problems where you can't start the game on your psp, then read on please, and thank you.
Posted by Cousinmuscles on Jan 1st, 2012
THIS TUTORIAL IS FOR THOSE WHO NEED HELP DOWNLOADING ON THEIR PSP1000!
1. Turn on your psp.
2. Open the internet browser.
3. Go to the URL and type in Psp.gdteam.net
4. Once you're there, hit the long arrow in the top right corner of the page. It is next to the search button.
5. After you hit the arrow, hit HB-Games, which is right next to the arrow.
6. Scroll down through the great games and find the one that says NZP above it.
7. Hey. This is exactly what i was trying to download on MODDB.Com, but it wouldn't work for my terrible psp.
8. So anyway, press the zombies preview picture, and it will begin to
download. It will start the first part of the download, so when it
finishes, it will begin the second part.
9. Once you do that, exit the browser to the psp home page.
10. Go to the games folder and scroll all the way down to the folder named memory stick.
11. You will see a new file with a golden dragon on it.
12. Press it like you would any other saved game.
13. Press X to begin the extraction. This is really cool because it
will extract straight from your psp instead of you having to extract it
from your computer!!!!
14. It will take quite a while to extract. When it finishes installing, it will tell you in red letters to press X to EXIT.
15. Press X and it will send you back to the PSP home.
16. Go back to where the file you extracted was and you will find the amazing NZP Game!!!!!
I Hope this was helpful. Tell me if you have any problems.
Also, the game MAY get old later on, so always search online in case you want maps.(You probably already knew that)