Are there any known changes with the way the game plays as Knuckles in the SEGA AGES release compared to the 1992 release? Sonic has the dropdash to distinguish it from the 1992 release, but Knuckles does not have access to this feature. The Sonic 2 (1992) leaderboards currently have many re-releases on several platforms as they all play the same way, rather than separate leaderboards and this may apply for Knuckles on SEGA AGES if there are no changes. An example of a change in gameplay was found in SEGA AGES Sonic The Hedgehog with the spindash and dropdash abilities disabled, in which the kill plane at the bottom of the camera border was no longer in effect, making a few levels faster or easier to avoid a death.

This game needs a Best Ending category, separated by version: Genesis (to include the re-releases on GCN, WiiVC, PS2, PS3, Xbox, X360, and the Steam client on PC), PC (1997/1998 Windows PC release and re-releases also for Windows PC), and Saturn. This category adds new content to speedruns in the form of playing the special stages, playing an additional boss fight, and different routing in levels. The concept of a game having some sort of 100% completion category that adds an appreciable amount of new content to the speedrun that is easy to define and is built into the game is common throughout the speedrunning community and most Sonic games on this site have a category that includes emerald collection. The various releases of the game have different special stages that vary in length and are not competitive with each other. To alleviate some confusion, the release for the Steam client on PC is an emulation of the Genesis release and should be listed under Platform as Genesis Emulator (this includes all 3 of the existing PC runs at the time of this post). This has been implemented on leaderboards for other games, such as the Streets of Rage series.