Metal Sonic Hyperdrive is a full hack of Sonic the Hedgehog for the Sega Genesis/Megadrive that features brand new Levels, Music, Gameplay difficulties, Special moves, Playable characters, and etc.
The hack originally started under a different concept back in 2011, with a walljump feature that’s suppose to make the gameplay a mixed of Sonic and Megaman X. because of it, level designs revolves around the use of the Walljumping mechanic including bosses. it later got removed for the sake of polished level designs and gameplay. a total revamped began in 2013 with multiple changes, including all levels done on scratch. another beta of Hyperdrive has been released for the Sonic Hacking Contest 2013, winning the most trophies including 3rd place/Dust Hill Trophy for best overall hack and the Community Trophies regarding the level designs. a Full Release of the hack began in Thanksgiving November 28th with a Youtube trailer and Wii Virtual Console demonstration.
Full Hack originally release in November 28th 2013, this recent update contains a few bugfixes, slightly longer and harder level layouts, and a few other tweaks and features, such as a Extras Menu (that can be entered by pressing C on Title Screen) Survival Mode.

http://www.romhacking.net/forum/inde...c,17417.0.html