Grazie agli sforzi della Sonic Community emerge dalla rete un pezzettino di Sonic X-Treme per Sega Saturn. In particolare in uno spezzone del programma canadese degli anni ’90 The Anti-Gravity Room, tra i diversi giochi Sega e Nintendo mostrati è possibile vedere una boss fight con tanto di Metal Sonic riguardante proprio Sonic X-Treme.
Un altro pezzetto di quello che doveva essere il primo vero Sonic 3d della storia, condito dalla verve di quegli anni.

Di seguito alcuni dettagli su come funzionava questa boss fight:

Christina Coffin, developer:

The L,R triggers were set up to rotate the camera around sonic.
You could also press a certain button on the Saturn controller to
‘lock the camera onto the boss’ so then all of your d-pad movement
would become relative to the boss character.

For example:
lock on mode controls:
left/right on d-pad lets you circle strafe left/right while facing the
boss (good for dodging projectile from mecha sonic)
up made you run towards the boss while the camera is still looking at
him.
down made you run away from the boss while the camera still looked at
him.

As you can imagine, fighting the boss with the camera in ‘lock on
mode’ is very useful to dodge harmful things from the boss, and makes
it feel more like a 1 on 1 fighting game which is what I wanted.
Having the unlocked camera mode, where the camera stays in 3rd person
view behind sonic is also useful as well, so it depends on player
preference and certain bosses (I had plans for another boss to spawn
smaller enemies around him that you would have to jump/spindash into
and they go back to fighting the main boss)