Sonic Xero v3.0 (2nd beta release) and Sonic Xero v3.0 final (fixed) are likely versions of a single fan-made Sonic game for the Sega Genesis, indicating an iterative development process typical of many ROM hacks and indie game projects. The ‘Xero’ title likely refers to a unique concept or setting within the game. The versions’ release history suggests a focus on refining and improving the initial release, reflecting a commitment to quality and player experience. Specific details about the game's gameplay or the identity of its creators require further investigation within the Sonic fan community.

Sonic Xero v3.0 (2nd beta release)

Sonic Winter Adventures