After releasing Pac-Man World 3 in 2005, between 2008 / 2010 Namco America (Namco Hometek) were working on a “Next Gen” Pac-Man 3D platformer for Xbox 360 and Playstation 3. While this “Pac-Man World 4” was never officially announced, fans of the series found a concept trailer created for the project by a former Namco animator. Gameplay looked similar to previous Pac-Man World chapters: Pac-Man would have been able to roll and run around the levels, transforming itself into different forms such as a propeller and some kind of spiky drill.
We don’t know why this project was never completed and fans had to wait till 2013 for another Pac-Man platformer, when Namco released Pac-Man and the Ghostly Adventures. Concept art created for this lost game are preserved below, to remember its existence.
Thanks to Paruko for the contribution!