Did you just find a download or a file on your computer that has a digital signature from JumpStart Games, Inc.? If that's the case, please read on.
You'll typically notice JumpStart Games, Inc. when running the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screencap shows:

You can view the additional details from the JumpStart Games, Inc. digital signature with the following steps:
Here is a screenshot of a file that has been digitally signed by JumpStart Games, Inc.:

As you can see in the screenshot above, Windows states that "This digital signature is OK". This implies that the file has been published by JumpStart Games, Inc. and that no one has tampered with the file.
If you click the View Certificate button shown in the screenshot above, you can view all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also examine the address for JumpStart Games, Inc., such as the street name, city and country.
Symantec Class 3 SHA256 Code Signing CA has issued the JumpStart Games, Inc. certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the JumpStart Games, Inc. files I've gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the JumpStart Games, Inc. files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by JumpStart Games, Inc..
| Detection Ratio | File Name |
|---|---|
| Not available | SoD-windows-installer.exe |
The analysis has been done on certificates with the following serial numbers: