Subject Sigma



"The Thinker's perfect equation has predicted your every move, Sigma. It knew you would be here, it knows where you'll be next... and it knows that you... will... fail."

- Reed Wahl

Subject Sigma (Symbol: Σ) is the protagonist of the Minerva's Den DLC BioShock 2. He has been revived by Charles Milton Porter and Brigid Tenenbaum, who sent out a distress call and who works with Sigma during the course of his adventure.

It is revealed that Sigma is Charles Milton Porter, who was previously jailed in Persephone due to Reed Wahl creating a fake audio recording of him so he would be accused of treason. Porter was then turned into an Alpha Series Big Daddy with no recollection of his previous life. His creation, The Thinker, found a way to revive Porter and helped him escape from Rapture by assuming Porter's personality as a familiar face to guide him.

Bugs/Glitches

 * In The Thinker level of Minerva's Den, the symbol for the Greek letter "sigma," visible on Subject Sigma's left hand, is replaced by the Greek letter "delta," belonging to Subject Delta.

Trivia

 * Although Jack and Subject Delta start off with finding Electro Bolt as their first Plasmid, Subject Sigma's first Plasmid is Telekinesis, which is already equipped from the start of the game.
 * Sigma is the eighteenth letter in the Greek alphabet. This means that Sigma was the eighteenth test subject taken from Persephone for Alpha Series conversion. Sigma is often used in Science and Mathematics to indicate summation of a set or series. This may explain why he begins with the Telekinesis Plasmid, as he is later in the series.
 * Sigma's suit is colored differently, resembling Subject Omega's but with a slight green tinge added to the black and grey tones.
 * Unlike other Alpha Series, Sigma is not bonded to one specific Little Sister. This is because Sigma never made it to the bonding stage before becoming active.
 * A photograph in the ending video of Minerva's den shows the parts of Sigma's suit on the ground. Oddly, the boots are actually those of a Rosie, and not Alpha Series.
 * When Subject Sigma lifts the platform off of him at the beginning of Minerva's Den, the player can see that the rendered right arm is actually a mirrored left arm, as apparent by the reversed Sigma letter. However in the image above, they are both facing one direction.
 * Although Subject Sigma is able to use Vita-Chambers in Minerva's Den, it is never explained how. However, it can be assumed that the Thinker helped to reprogram the Vita-Chambers for Subject Delta and Sigma as hinted by Reed Wahl in one of his Audio Diary.
 * Oddly, Sigma's helmet in the Ending of Minerva' Den is still seen glowing although it's removed. This may have been overlooked by the developers and didn't have time for changing.
 * Much like Subject Delta, Subject Sigma can still eat and drink despite having a helmet on.
 * Sigma was previously mentioned in the Audio Diary Alpha Series, as the latest produced Protector at the time.