Sonic Forces/Beta elements

Sonic Generations leftover animations
All the animations for Classic Sonic from Sonic Generations present in the files, including the unused dancing animations with their proper names. The animations were edited so that Sonic's mouth and eyelids don't move.

Sonic Lost World leftover skybox
A skybox texture from Sonic Lost World can be seen on early promotional screenshot of Sunset Heights.

Unused Null Space dialogue
The player spawns in the middle of the first section of Null Space. By hacking, it is possible to start from the beginning, triggering some unused voice lines:
 * "A prison that goes on forever, huh? At least getting sent here taught me something. Nothing beats realizing that you're not alone!"

Unused Egg Gate dialogue
Swapping the object placement data also causes the game to load wrong voice lines. When playing Green Hill with Enemy Territory object placement, voice lines for Egg Gate play, some of which could not be heard during the actual stage:
 * "Phew! I needed a good workout after all that rest."
 * "I haven't lost my edge."

Unused Shadow move
Hacking a certain value of Shadow the Hedgehog's Boost code aside from changing the effect causes an unused sound effect play, possibly for Chaos Control.