One leaked product, called Pimps at Sea, for Halo 3. This leak is based on an Xbox 360 JTAG/RGH/devkit. And even though the Xenia emulator can load it, it won’t be possible to go further than the menu.
Halo 3 – Pimps at Sea is an early build with cut content and placeholders from Halo 2. The main objective of the investigation is to identify the evolution of Halo 3. However, Halo 3 fans may find this interesting.
You can download the leaked build from here.