In the original game, Sirrus is played by Robyn Miller. In following games, he is played by Brian Wrench. He is portrayed as the tricky and scheming brother, highly greedy with refined tastes. He tends to speak in a very proper manner.
In the original game, Achenar is played by Rand Miller. In following games, he is played by Guy Spring. He is portrayed as the crazy and dangerous brother who loves to torture humans and animals alike, and shows dangerous sociopathic tendencies. In Myst, he is portrayed as giggling incessantly. This trait is diminished when seen in Myst IV: Revelation, where his is portrayed more as a survivor in the wilderness, plagued by his solitude.
Born to Atrus and Catherine on Myst Island, Atrus was quick to show Sirrus and Achenar around all the worlds that he had created. He would take the two of them on journeys to the ages and introduced them to the wonders of the Art, but he was nervous about teaching it to them.
Role in the seriesEdit
In the original game, all Ages of MYST appears to be empty, lifeless shells of the once beautiful worlds described in Atrus' journals. It is believed that Sirrus and Achenar are responsible for plundering the ages dry to satisfy their greed and blood-lust.
Most Ages of MYST featured the living quarters of the brothers. Achenar's various rooms are filled with devices for torture, including an electrified cage, a jack-in-the-box that has a cobra hidden inside, a collection of lethal poisons, and a large contraption for tearing the victim in pieces. He also appears to use various tribal masks and holograms to instill fear into his victims.
On the other hand, Sirrus' quarters are richly decorated. Even in the barely civilized Channelwood age, his quarters are furnished in an aristocratic colonial style. He appears to have plundered a large amount of gold, and he has a large collection of fine clothing, sophisticated "toys" (such as a mechanical parrot), fine wine and drugs. In one letter from Achenar, it mentioned a certain "new tax" introduced by Sirrus.
It is uncertain if the original inhabitants of the MYST ages are driven out by the oppressive brothers, or outright killed off by the brothers. A collection of human skeletons and rotten corpses can be found in Achenar's torture chambers.
In Myst, Sirrus and Achenar are the first and most frequent characters The Stranger interacts with. They are imprisoned in Trap Books, then described as the void between two worlds when a linking book's writing isn't quite finished. (This was retconned in later games.) Sirrus was trapped in a book with a red cover and pages, while Achenar's book had a blue cover and pages. Both books had pages ripped out of them. The linking panel's image was too heavily distorted at first to even see the brothers, until the stranger inserts the first missing page into each book, at which point, the brothers can, if only barely, make contact.
Sirrus and Achenar guide the player through the game to an extent, telling them the story behind what occurred on Myst Island in the past, albeit mostly lies. However, the majority of their dialogue is used to either incriminate the other brother for dangerous crimes, or to plead for the player to find more pages, claiming that they will be released from their wrongful imprisonment once all the pages of their color are found and inserted into their books. A message from Atrus in a hidden chamber on Myst Island reveals that he believes the destruction of the various ages is due to one of their sons; he believes Achenar is responsible, but that he "shouldn't leap to conclusions. After all, it might have been Sirrus as well."
As The Stranger works their way through the four ages of Myst, they discovers the character of each brother. Sirrus' quarters in each of the ages are full of fine tapestries, gold, drugs, etc. Achenar's rooms contain torture devices, disturbingly dangerous toys, and even recordings of him angrily shouting in a foreign language. Both brothers' rooms often have messages from the other, usually threatening or scheming in nature.
The final clue to the guilt or innocence of the brothers is given by Sirrus and Achenar themselves. They explain that the final page to each of their books lies behind the fireplace in the library of Myst Island via a secret panel. Both brothers explain that there is a green book back there as well, but that the Stranger should not touch it. Sirrus states that the Stranger will become trapped as they are if they do, Achenar claims the Stranger will be killed if they touch the book.
In truth, the book was a link to D'ni, where their father, Atrus, is imprisoned. Atrus explains that both brothers destroyed his ages, and trapped him and his wife as well. Their greed led them to imprison themselves in specially designed trap books he had left on Myst Island. Once the Stranger finds the white page and delivers it to Atrus, he can escape his prison on K'veer Island in D'ni, and burns the linking books containing the brothers.
The Brothers' Fate after MystEdit
If The Stranger returns to Myst Island after the conclusion of Myst, there are burn marks where their trap books once were. The final fate of the brothers became skewed at this point, as it was believed at first that with the books being destroyed, the brothers were killed as well. It was later revealed that the destruction of the linking book did not kill the brothers, as they are shown to still be alive in Myst IV: Revelation. However, this created a contradiction and retcon; trap books, which were at first described in Riven as a special kind of book that traps a person in the void between ages, were written out of canon. Instead, it is written in that Sirrus and Achenar were actually trapped in the ages of Spire and Haven, respectively, two empty ages with no way out.
This retcon created contradictions between the first two games and the fourth. Some fans speculate that Atrus, before burning the two books, completed the link, sending the brothers to Spire and Haven. However, canonically, the series suggests that the brothers were in Spire and Haven all along, and that the creators did not want to "reward" the player for failing the game by giving them another age to explore if they freed one of the brothers instead of Atrus at the end of Myst.
Myst 4: RevelationEditIn Myst 4: Revelation, Atrus writes a letter, inviting The Stranger over to talk about Sirrus and Achenar. He admits that when he burned the red and blue books before, Sirrus and Achenar did not die as previously stated. Instead, he imprisoned them within the ages of Spire and Haven, hoping that they would reform in solitude. Though he has made several trips to the ages with his family, he ultimately wants The Stranger to decide whether or not they've reformed and are worthy of release.
After some exploration, The Stranger learns that both Sirrus and Achenar spent many years exploring their prisons, searching for the linking book Atrus left behind and adapting to their surroundings. Sirrus has used science to upgrade Spire with electromagnets, ships and power grids, while Achenar had learned the traits of the animals and created ways to communicate with several of them. Their journals also suggest that their behavior has changed over the years as Achenar is much calmer and more stern and Sirrus is much more bitter and vengeful. However, both prison ages are vacant and the two brothers are nowhere to be found within them.
After gaining access to Serenia, The Stranger is shown events that suggest Yeesha is kidnapped by the two brothers. Further into the age, The Stranger runs into Achenar, who is in the midst of stealing the life stone and proclaims that he has reformed and is only trying to stop Sirrus's evil plan. He points The Stranger to his journal, hidden within the age, which shows the two brothers plotting to use the age's Memory Chamber to steal Atrus's memories, which will allow them to learn The Art. After further exploration, The Stranger runs into Sirrus, who proclaims Achenar is still crazy and is plotting to kill their father and suggests you fetch him to solve this before locking himself in the unused memory chamber.
After finding a way in, The Stranger finds Yeesha strapped to a chair and begs him/her to pull the silver lever to release her. Achenar rushes in and explains to The Stranger that Sirrus placed his memories into Yeesha's body in an attempt to fool Atrus into teaching him The Art and begs The Stranger for his trust, asking him/her to pull the amber lever instead. Yeesha proclaims that Achenar is truly crazy and that he will murder both her and The Stranger.
In the first bad ending, The Stranger frees Sirrus (as Yeesha), who crushes both Achenar and The Stranger underneath a crushing ceiling. The Stranger is barely concious to see Sirrus gloat about how his disguise is perfect and that Atrus and Catherine will meet a similar fate after he learns The Art. Sirrus then shoots and kills him/her with the crossbow Achenar brought. In the second, Achenar gets closer to The Stranger to beg him/her to pull the amber lever as Sirrus steals his crossbow and shoots him in the back. Sirrus then gloats about his disguise and kills The Stranger with the crossbow.
In the only good ending, Sirrus gets knocked unconcious as the Memory Chamber starts to collapse. Achenar rushes to stall the collapse in order to give The Stranger enough time to return Yeesha to normal. The Stranger then visits Dream and finds Sirrus's spirit blocking Yeesha's memories. After unscrambling the memories, Sirrus is detached from Yeesha and dies in Dream, unable to return to the waking world without a spirit guide. Yeesha and The Stranger return to find Achenar barely concious, who explains that the only way to stop the Memory Chamber from collapsing was to place the stone directly on the plant, which mean breathing in fatal amounts of toxic gas. He shows regret and tells Yeesha and The Stranger that it's better that he dies as repentance for all the things he had done prior to Myst. Achenar then leans over into Yeesha's lap and dies. The Stranger then returns to Tomahna, where a regretful Atrus thanks him/her and vows to spend more time giving Yeesha love and care.
Time wise, Sirrus and Achenar are first mentioned at the very end of Myst: The Book of Atrus as playing happily on Myst Island. Chronologically, they are the first characters that a player meets when playing Myst.