This is a list of Xbox games that are compatible with the console's successor, the Xbox 360. Microsoft ceased adding titles to the list in November 2007, so the list is considered final. As of April 2010, original Xbox games no longer can be played online via the Xbox Live service, as it was ended for the original Xbox console. However, online multiplayer still is possible through third-party LAN Tunneling programs that manipulate System Link, such as XLink Kai. Downloadable content for these titles is not available via Xbox Live. This includes the Xbox Originals downloaded on the Xbox 360 and any Xbox game running on the Xbox 360.
Answer this question, making sure that the answer is supposed by the text: can you play old xbox games on xbox 360?
yes