|Status||Alive (Possessed by SHODAN)|
|Game(s)||System Shock 2|
|Voice Actor||Esra Gaffin|
Siddons and Suarez had been in contact for a while before the situation aboard the Von Braun fully deteriorated. Shortly before The Many took over the Von Braun and Rickenbacker, Siddons and Suarez met aboard the Von Braun and made a plan to escape the ship together should the situation become dire.
Siddons managed to fix the final, unlaunched escape pod on the Command Deck. Separated from Suarez, she was bitten by an Annelid Arachnid on the Recreation Deck, and poisoned. Apparently, Suarez had managed to find her with help from the Resistance on that deck, and rescued her.
She is seen escaping the Von Braun with Tommy Suarez in an escape pod on the Command Deck.
After the Soldier defeats The Many and SHODAN he sends a hail to Suarez and Siddons' escape pod. Suarez decides to turn back and rendezvous with the Von Braun. However, he discovers that Siddons has somehow apparently been possessed by SHODAN. Rebecca's fate is unknown.
She is set to return in System Shock 3.
|System Shock 2 Characters|
|Starship Von Braun|
|Engineering Deck||Marie Delacroix • Juan Curtiz • Constance Sanger • Martin|
|MedSci Deck||Grassi • Taz Amanpour • Angela Loesser • James Watts|
|Hydroponics Deck||Marc Miller • Erin Bloome • Prefontaine|
|Operations Deck||Janice Polito • Melanie Bronson • Rebecca Siddons • Turnbull • Malick • Yount • Wood|
|Recreation Deck||Frank Yang • Alice Murdoch • Rosenberg • Enrique Cortez|
|Command Deck||Anatoly Korenchkin • Norris • Malone • Myers|
|UNN Rickenbacker||William Diego • Bayliss • Thomas Suarez • Croker|
|Non-Specific Location||XERXES • SHODAN • The Many • A. Bananas|