A Convergence Event (Or Convergence) was the final process of a Marker and the affected lifeforms of a given planet (Or planets).
Throughout the series, "Convergence" as it was described by Unitologists was a vague description of becoming a singular entity or made whole by a Marker. Unitologists sought to preserve the bodies of the deceased in mausoleums or during a Necromorph outbreak, suicide by apparent suffocation or self-mutilation, allowing the lifeform to take over their bodies.
In reality, Convergence was a process triggered by a Marker when a large enough amount of organic matter became infected with the Necromorph pathogen. The Marker would pull all of the infected tissue into the stratosphere where a Brethren Moon formed and absorbed the Marker that created it along with the organic tissue of the creators of the Marker.
Once a Convergence Event was initiated, the Marker flashed brightly and emitted a fog horn-like sound. Powerful thrusts of wind flung the Necromorphs into the air and above the Markers, creating the first pieces of the Brethren Moon. The chunks of nearby planets and asteroids are caught and collected in its gravitational pull as the Moon grew larger and larger. Once the Brethren Moon was completed, the creators of the Marker must be killed and "absorbed" into the sentient moon, possibly in order to give it the sentience needed to guide its feeding on organic life throughout the galaxy.
A Convergence Event could be stopped either by the destruction of the Marker that triggered it or by the destruction of the incomplete Brethren Moon itself. In the case of the moon above Tau Volantis, the Alien Machine powered by a Codex was successful in slamming the moon into the planet itself to kill it.
- When Convergence was initiated, a surge of electromagnetic energy shocked out from the Marker's base, wiping out most electronic machinery as it was evidenced when the Aegis VII Marker disabled the USG Ishimura's gravity tethers with its shockwaves.
- In the event that multiple Markers are present during Convergence, a random Marker was used as the primer of the event and the other ones are re-absorbed into the Moon. These re-absorbed Markers could be utilized as kinesis-propelled projectiles during the Tau Volantis Moon fight.