hello, thanks for using our sites..
the error usually comes when you have the incomplete archieve download or your server cant upload and extract the big files. for the solutions:
1. download the games from our server and make sure the size is same as in descriptions
2. upload the zip files using upload achieve and see if it complete successfully.

if not,

1. extract the pack, throw out some game inside to decrease the size of pack, and compress it back.

if still can upload,
check with your server, if zip files is allowed.
go to joomla admin panel > server.
look at media settings > legal extensions (file types)
add "zip" there.

hope thats works.

regards,
a3d

The zip files are corrupt.
RG:(

Addy, this method isn't very solid. Do you mind providing more detail please?

What I did was:

Download Action Pack 1
Extracted Action pack 1 game folders into a new folder called "Action"
Opened Winrar, compressed "Action" as .zip file.
Attempted to upload Action.zip file.
Error Extracting base ZIP file: Missing archive file '' [code -4]

Granted, it's starting to appear that certain games may be causing the issue, as some pack zips work find downloading from here and then uploading them without doing anything. So far (what's working for me anyway) the following packs work:

Puzzle pack 2
Shooting pack 2
Yeti pack 1

What doesn't work (again, after my own attempts):
Action pack 1 - 4
Puzzle pack 1
Shooting pack 1
Sports pack 1 - 2

That's 8 of the 11 packs that don't work. It'd be really great if someone could look into this and upload fixed files, but hey, it's free service, not much we can do unless we fix it ourselves.

get the same thing here..Error Extracting base ZIP file: Unable to find End of Central Dir Record signature [code -10]
never had this before from here...