Walker (also known as 'Clown Downtown' or 'Schussel, der Polizistenschreck') is an action game, developed by Starsoft and published by Quelle, which was released in Europe in 1983. The game is similar to another Atari 2600 game: Bobby is going home.
You can control this game easily by using the keyboard of your PC (see the table next to the game). However, for maximum gaming enjoyment, we strongly recommend using a USB joystick that you simply plug into the USB port of your computer. If you do not have a joystick, buy a suitable USB controller in Amazon or in some of your favorite online stores.