Thomson has become a popular manufacturer of both wired and wireless routers. They are fairly easy to configure, and tend to have noticeably reliable performance characteristics.
One of the nice things about Thomson routers is they generally all have the same user interface. They are easy to set up, and their port forwarding section is no different. If you have a Thomson router you should have no trouble forwarding ports for your game system or any other application on your computer.
If you cannot find your exact router in the list below, try following one of our Thomson DWG855 guides. That should get you an open port on pretty much any Thomson router.