Auto Running

Auto Running is a reoccuring game mechanic in the Sonic the Hedgehog series.

What It Does
Auto Running involves the character moving forward automaticly using a "on the rails" style movement, across a open path while the player controls the character's left-to-right movement and attacks.

Sonic the Hedgehog (2006)
Auto Running was used in the "Mach Speed Levels" in Sonic's story. This was done to create a feel of excitement for the player, although the final result was ended up being very glitched and unenjoyable.

Sonic and the Secret Rings
Auto Running was used in all the Adventure levels in the game. In this game you can customize the speed of Sonic to fit level, making this variation more enjoyable.

Sonic Unleashed
Auto Running didn't play as huge of a role in Unleashed, but it was used throughout all the daytime sub-bosses and bosses of the game. Since it was only used during boss levels, it didn't recieve any criticism.