https://www.polygon.com/2018/4/10/17219096/new-original-xbox-backward-compatible-games-announced

Later today, Microsoft plans to reveal news about Xbox One backward compatibility and which original Xbox games are coming to the console next. Based on store listings at the official Xbox website, it appears at least five more original Xbox titles may soon be playable on Xbox One.

The titles that have recently appeared on the Xbox Games Store, some of which carry release dates of April 10, 2018, are: