The Seal of Metatron (also known as the Talisman, Virun VII Crest and Circle Emblem) appears in Silent Hill, Silent Hill 2, Silent Hill 3 and Silent Hill: Downpour. It also appears in Silent Hill: Revelation. The seal was said only to be given the name Metatron because of its difficulty to control.
The seal, previously thought to be the Mark of Samael, is actually the Seal of Metatron; Dahlia Gillespie reveals this, and that it is a symbol closely associated with the Order. As far as the Order is concerned, the Seal is nothing more than a talisman, and is of no particular significance. That is not to say it is worthless, or even powerless for that matter.
Its power is derived from the spiritual strength of its user. Had Alessa Gillespie fully completed her task of placing the symbol throughout Silent Hill, one cannot say what may have happened, or if that power would have been controllable.
Alessa Gillespie inscribes the symbol around the town to try and prevent the birth of the Order's chief deity. In an attempt to mislead protagonist Harry Mason during his quest for his daughter Cheryl, Dahlia convinces him that the symbol is that of Samael (often times attributed as the Angel of Death). At the end of the game, Dahlia tells Cybil Bennett that if Alessa had completed her quest in placing the seals, all would have been for naught.
Bound by the cult's spell and living in an endless nightmare in agony, Alessa's wish is for a complete death. Since she is unable to die in a normal fashion while under the influence of the power of the malevolent deity, Alessa intends to "annihilate" herself by the power of the Seal of Metatron with the nightmare world at hand. Alessa creates the Seal of Metatron at the school, hospital, antique shop, lighthouse, and amusement park. Drawing lines connecting the seals and their placement creates an enormous Mark of Samael throughout the town. The seal may also have been created in other places as well. 
At the moment Cheryl and Alessa unite, she gains the power to escape from the cult's spell; at the same time, the technique that brought about the descent of the cult's god succeeds and the malevolent deity resumes its maturation process. This time, Alessa is engaged in a race between the malevolent god's maturation and the seal's completion. If the seal were to be completed, Harry, Cybil, Dahlia and the others would all be annihilated along with Alessa. This is why Dahlia fools Harry.
In artwork, Incubus bears a metal sculpture of the Seal upon its back, though it is not included in the actual game.
Silent Hill 2
During the final battle against Pyramid Head, two printed symbols of the Seal of Metatron can be seen in a rug.
Silent Hill 3
Convinced by Vincent Smith that the Seal of Metatron will prevent the birth of the Order's God, Heather Mason hunts down Leonard Wolf, an ex-priest of the Order. Considering himself appointed guardian of the symbol, Leonard proceeds to attack Heather to defend the Seal. With his defeat, Heather is able to obtain the seal. In the end, however, Claudia Wolf proves it ineffective.
The attendant of God, Valtiel, has the Seal of Metatron tattooed on each shoulder. It is important to note here that both Metatron and Valtiel are described by Silent Hill's scenario writer, Hiroyuki Owaku, as "agents of God" in the Book of Lost Memories.
Heather is given an occult book by Vincent that contains an excerpt on Otherworld laws, which reads:
- "This magic square, with strong protective and dispelling properties, is called the 'Virun VII Crest' or the 'Seal of Metatron'. It will bring results regardless of whether the target is good or evil; its strength, therefore, places a very high burden on the caster. As it is also difficult to control, it is not usually used. This is why it bears the name 'Metatron', after the angel Metraton (or Metatron), also known as the 'Agent of God'".
Silent Hill: Downpour
The Seal of Metatron, known as the Circle Emblem here, is an obtainable artifact in the Digging Up the Past sidequest.
Silent Hill: Revelation
Years before the film, Rose Da Silva used the Seal of Metatron to free her adopted daughter, Sharon Da Silva, from the realm of Silent Hill. In doing this, one half of the seal remained in Silent Hill, guarded by Leonard Wolf, while the other half was given to Christopher Da Silva.
During the film, Heather finds half of the Seal of Metatron in a box her father has kept in his room, but she doesn't know what it is initially. When Heather confronts Leonard, he cryptically tells her that it reveals the "true nature" of things. When she gives him her half of the seal, Leonard transforms into a monster and Heather defeats him by removing the seal from his body. Later on, Heather gives Claudia the seal and she transforms into the Missionary via the power of Alessa merged with Heather.
|“|| To the town's religious organization, the Seal of Metatron is an ordinary talisman with no particular significance. As Alessa was unable to spread this crest throughout the entire town in the first game, its power was never demonstrated. In spite of this, both Vincent and Leonard misunderstood its abilities.
|Heather Mason - Christopher Da Silva - Vincent Cooper - Claudia Wolf - Leonard Wolf - Dark Alessa - Douglas Cartland - Alessa Gillespie|
|Rose Da Silva - Dahlia Gillespie - Suki - Travis Grady - Order Soldier - Detective Santini - Mannequin Girl|
|Armless Man - Delusion - Leonard Wolf - Lobotomy - Mannequin Monster - Memory of Alessa - Missionary - Nurse - Pyramid Head - Valtiel|
|All Hallows High School - Brookhaven Asylum - Central Square Shopping Center - Jacks Inn - Sanctuary - Silent Hill, West Virginia - Lakeside Amusement Park|
|The Brethren - Halo of the Sun - Monster - Manifestation - Otherworld - Fog World - Real World - Robbie the Rabbit - Seal of Metatron - Siren - The Order - Great Knife - Welcome Sign|