Firmware downloads for the 4-Play and Gamer-Pro products.










Firmware(1.51)     –  Firmware flashed at production.
Firmware(1.56.1)  –  Latest firmware version available for 1.


Firmware (2.0) –  Newer firmware supporting advanced features (use the API tool for version info and programming). The API tool can be updated via source forge or downloaded here. At this time the API tool is only available on the windows platform.

XBOX (original)

Use the 4-Play or the Gamer-Pro on the Original Xbox. API 2.0 Features need to be programmed with the normal 2.0 firmware but the saved programming will remain once the XBOX firmware is loaded (such as mapping).  Only single player mode is available.


Use the 4-Play or the Gamer-Pro on the Nintendo Switch. API 2.0 Features need to be programmed with the normal 2.0 firmware but the saved programming will remain once the Switch firmware is loaded (such as mapping).  Four player mode supports 4 separate players if all ports are flashed. 

3.0 – It’s Here!

The latest version of the Gamer-Pro and 4-Play firmware is now available. Backwards compatible with 2.0 with many new features and an all new button layout. See the online manual for the changes. This version now supports the new LLAPI to be used with the BlisSTer board and the up coming Bridge.


Runtimes and tips. 

WinUSB does not support control transfers correctly. Firmware 2.0 will not work with WinUSB. HidUSB is the default windows driver and the suggested driver for 2.0. Use this tool to check if you have WinUSB installed.

Flashing From 1.0 to 2.0
When flashing a new version of 2.0 you must first remove your existing drivers. This tool can help with the removal.

Standalone Flasher.  
The Flashtool ( only required for 1.x, but works with new firmwares) may require C++ Run-times if you see the side by side error. C++ Run-time for Windows 7 use these run-times.

API TOOL requires Direct X
Note: 2.0 is updateable within the API Tool. The API Tool does require Direct X Run-Times.
Direct X Run-Time for Windows   run-times.

NOTICE:  Bliss-Box cannot support or endorse any unofficial firmware. If you are running a custom or modified unofficial firmware it could void your warranty. If an RMA is submitted and an unofficial firmware is loaded onto the device, Bliss-Box reserves the right to apply a fee upon returning the unit to you.
 The Flash Tool is an unmodified version of the original V_USB HIDBootFlash. This tool is used to flash devices using firmware 1.x. NOTE: do to the GLP license this has been left unmodified. So make sure to update the Product ID as shown in the image. 16d0 0a5f


Also available is a linux Binary no GUI.
./linux_updator -r 4-Play_2.0_final_230.hex 16d0 0a5f

Here is a link to the source project it was built from


The API Tool is a tool to demonstrate and use the Bliss-Box 4-Play/Gamer-Pro to its full potential. The tool is released open source for any to use and modify but may not be sold for commercial use. 

The API has many features for use with the 4-Play or Gamer-Pro adapters.  From programming preferred settings to pulling info about the adapter to interfacing with controller peripherals.

This tool only supports 2.0 and greater firmware and will guide you in updating your existing 1.x device as well as programming the ports with individual player IDs.