Did you just find a file that has a digital signature from En Masse Entertainment? If that's the case, please read on.
You'll probably see En Masse Entertainment when double-clicking to run the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screengrab shows:

You can also view the En Masse Entertainment certificate with the following steps:
Here's a screenshot of a file that has been signed by En Masse Entertainment:

As you can see in the screenshot above, the Windows OS states that "This digital signature is OK". This means that the file has been published by En Masse Entertainment and that no one has tampered with the file.
If you click the View Certificate button shown in the screencap above, you can examine 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 En Masse Entertainment, such as the street name, city and country.
Thawte Code Signing CA - G2 has issued the En Masse Entertainment certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screencap above.
These are the En Masse Entertainment files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/54 | TERA-Launcher.exe |
| 0/55 | TERA-Launcher.exe |
The detection percentage is based on that I have gathered 109 scan reports for the En Masse Entertainment files. 0 of these scan reports came up with some sort of detection. You can view the full details of the scan results by examining the files listed above.
The analysis is based on certificates with the following serial numbers: