(Heads up: I haven't play that much of OM so something's may not be accurate,you can also be a Survivor/Executioner)

"MAP: X's CASTLE"

Here are the characters you can be and here are there scenarios

"Objective: survive untill the Green Ring Portal appears"

Survivors: Sonic: Was running around looking for the others

Tails: Was standing on a guard rail with his arm canon aimed and ready to fire at 2011x

Amy: Was getting healed by Cream after a encounter with 2011x

Cream: Healing Amy but also watching out for 2011x

Knuckles: Running around looking for 2011x ready to attack him

Metal Sonic: sticking with his creator Eggman

Eggman: he was hiding waiting for the Ring Portal to appear

Executioner: 2011x: was looking around for his victims