Source plot synopsis — includes the ending
The game is set in March 1937, and follows Anastasie "Tasi" Trianon, a French drafter on an expedition in colonial Africa. After her plane crash-lands in Algeria, she wakes up to discover that her companions are missing, with no recollection of what happened. Following the trail of her expedition, Tasi realizes that she is pregnant and has come into possession of a Traveler's Amulet, an alien device that allows her to travel to an alien world. During this time, she finds her husband Salim's corpse, having died from the crash.
Tasi reaches an abandoned French fort and discovers an unknown force has slaughtered its garrison. She contacts an expedition survivor, Dr. Metzier, who instructs her to head to a nearby village. Tasi travels under the fort and encounters mutated ghouls that stalk the tunnels. She makes her way out but is caught in a cave-in and falls into ancient ruins that belonged to a highly advanced, but now extinct, society. As she studies the ruins, Tasi learns that the facility was built by an alien race dubbed the Gate Builders, who could traverse worlds and extend their lives thanks to vitae, a substance obtained by torturing humans on a mass scale. A failed plot to end the suffering caused the Gate on their homeworld to destroy itself, wiping out the Gate Builders and spreading the Shadow, a dangerous force that manifests in red tumor-like growths. Tasi also comes across signs of a previous expedition led by Professor Herbert. To her horror, Tasi discovers that one of her expedition members, Leon, has been turned into a ghoul. She later rescues another expedition member, Richard, but kills him in a rage when he attempts to leave her to die.
Tasi activates a teleporter in the ruins to transport herself to the village, but finds it deserted and goes into labor. She encounters expedition member Yasmin, who in the process of turning into a ghoul had killed the villagers. Metzier arrives and kills Yasmin. Tasi enters labor, assisted by Metzier, and gives birth to a girl, Amari. Metzier takes Amari, claiming she is needed to reverse the curse causing them to become ghouls. Tasi chases after Metzier, who uses the Traveler's Amulet to travel to the Gate Builders' world.
During the pursuit, Tasi recovers her memories. Shortly after the plane crash, the Empress of the Gate Builders approached the expedition and brought them to the Gate Builders' world. The Empress, longing to be a mother after vitae treatment for an affliction rendered her infertile, gave them the Traveler's Amulet and promised to save them if Tasi gave her Amari. Tasi, still traumatized by the loss of her previous daughter Alys, refused. The Empress then tricked the expedition into drinking from a fountain that inflicted the curse, before sending them back to Earth.
Tasi catches up to Metzier and kills him. The Empress warns Tasi that Amari is afflicted with the same illness that killed Alys. She pleads with Tasi to allow Amari to stay with her, as she can provide vitae to Amari to suppress her illness, allowing her to live a full life. Tasi is left with three choices.
If Tasi leaves Amari behind, the Empress commends her for making the right choice and turns Tasi into a ghoul. Tasi roams the ruins of the Gate Builders' world with fragmented memories of Amari. This ending is also achieved if the player is captured by the Empress during the final section of the game.
If Tasi decides to fight the Empress, she injects the flesh of the Shadow into the Empress' vitae supply, killing the Empress and ending the Gate Builders' civilization. While this euthanizes the humans being tortured for their vitae, both Tasi and Amari are consumed by the Shadow's growth and perish.
If Tasi decides to flee with Amari, she activates a teleporter that sends her and Amari to Paris and beyond the Empress' reach, with both of them facing an uncertain future.
Tasi reaches an abandoned French fort and discovers an unknown force has slaughtered its garrison. She contacts an expedition survivor, Dr. Metzier, who instructs her to head to a nearby village. Tasi travels under the fort and encounters mutated ghouls that stalk the tunnels. She makes her way out but is caught in a cave-in and falls into ancient ruins that belonged to a highly advanced, but now extinct, society. As she studies the ruins, Tasi learns that the facility was built by an alien race dubbed the Gate Builders, who could traverse worlds and extend their lives thanks to vitae, a substance obtained by torturing humans on a mass scale. A failed plot to end the suffering caused the Gate on their homeworld to destroy itself, wiping out the Gate Builders and spreading the Shadow, a dangerous force that manifests in red tumor-like growths. Tasi also comes across signs of a previous expedition led by Professor Herbert. To her horror, Tasi discovers that one of her expedition members, Leon, has been turned into a ghoul. She later rescues another expedition member, Richard, but kills him in a rage when he attempts to leave her to die.
Tasi activates a teleporter in the ruins to transport herself to the village, but finds it deserted and goes into labor. She encounters expedition member Yasmin, who in the process of turning into a ghoul had killed the villagers. Metzier arrives and kills Yasmin. Tasi enters labor, assisted by Metzier, and gives birth to a girl, Amari. Metzier takes Amari, claiming she is needed to reverse the curse causing them to become ghouls. Tasi chases after Metzier, who uses the Traveler's Amulet to travel to the Gate Builders' world.
During the pursuit, Tasi recovers her memories. Shortly after the plane crash, the Empress of the Gate Builders approached the expedition and brought them to the Gate Builders' world. The Empress, longing to be a mother after vitae treatment for an affliction rendered her infertile, gave them the Traveler's Amulet and promised to save them if Tasi gave her Amari. Tasi, still traumatized by the loss of her previous daughter Alys, refused. The Empress then tricked the expedition into drinking from a fountain that inflicted the curse, before sending them back to Earth.
Tasi catches up to Metzier and kills him. The Empress warns Tasi that Amari is afflicted with the same illness that killed Alys. She pleads with Tasi to allow Amari to stay with her, as she can provide vitae to Amari to suppress her illness, allowing her to live a full life. Tasi is left with three choices.
If Tasi leaves Amari behind, the Empress commends her for making the right choice and turns Tasi into a ghoul. Tasi roams the ruins of the Gate Builders' world with fragmented memories of Amari. This ending is also achieved if the player is captured by the Empress during the final section of the game.
If Tasi decides to fight the Empress, she injects the flesh of the Shadow into the Empress' vitae supply, killing the Empress and ending the Gate Builders' civilization. While this euthanizes the humans being tortured for their vitae, both Tasi and Amari are consumed by the Shadow's growth and perish.
If Tasi decides to flee with Amari, she activates a teleporter that sends her and Amari to Paris and beyond the Empress' reach, with both of them facing an uncertain future.
Sources and content license
Source and revision history ↗ · Adapted from Wikipedia contributors, Amnesia: Rebirth. Section headings and formatting adjusted. · Content license