S³: Silent Storm: Sentinels (2004)

S³: Silent Storm: Sentinels is an expansion pack for S²: Silent Storm. It was released in 2004.

English Voice Over Actors:

 * Lynne Adams
 * Chip Chulpka
 * Rob Deleeuw
 * Bruce Dinsmore
 * Marcel Jeanin
 * Kyle MacDougall
 * Gordon Masten
 * Brady Moffatt
 * Jennifer Morehouse
 * Tony Rubinow
 * Sam Stone
 * Vlasta Vrana