Pong is the classic video game, essentially the “Hello world” of gaming development. James Bruce has developed a simple implementation of Pong for the Arduino which requires the addition of only an RCA jack, two 10K potentiometers, a pushbutton and a handful of resistors. The video output is made possible through the use of the TV Out Arduino Library. (Use the TVoutBeta1.zip download.)
You can find the project details and code link at MakeUseOf. The code can also be directly accessed from Pastebin.