RimWorld Anomaly

RimWorld Anomaly is a horror-themed expansion in which your colonists awaken a dark monolith and provoke an insane machine-mind. Its manifestations begin to haunt the world, bringing flesh infestations, cultist attacks, undead, blood rains, invisible hunters and other threats. You study the phenomena and seek a way to end the madness.

Strange phenomena

The dangers include an invisible hunter of human souls that returns each night to capture a victim. You can study its samples to learn to detect it, then hunt it in its lair. A vast flesh creature spreads across the map, defended by beasts and acid; collect samples from its nervous system to find its heart and kill it. A parasite secretly mind-controls colonists and tries to infect others, so you investigate evidence, imprison and interrogate suspects, and medically test them to identify the infected.

Other events include colonists becoming obsessed with a golden cube and building statues of it, and a pulsating obelisk that may duplicate people, send them to infinite gray mazes or mutate them with fleshy appendages. You must learn the obelisk’s effects and overload it. A corpse may also arrive that looks exactly like one of your colonists and seems to follow them.

Combat and containment

You fight squealing fleshbeasts, shambling undead, spherical death-machines, devouring water-beasts, human imitations and other threats. You can turn monsters against human and mechanoid enemies. When a vast hole opens in the ground, you descend into the caverns, kill the creature below and escape before the collapse.

To counter the monolith’s manifestations, you capture and study entities in a containment facility. Build and expand it with stronger walls, floors and doors, then use the captives’ powers against your enemies without pushing them too far. Your menagerie also provides bioferrite for crafting experimental serums, flamethrowers, hellcat rifles, flesh-mutating pulsers, insanity-inducing weapons and other void-powered tools.

Cultists and rituals

Cultists perform psychic rituals with suicidal commitment. Stop them before they abduct colonists, summon bloody beasts or drive people mad. You can also perform rituals yourself to summon the massed dead, rain rage-filled blood, or steal the minds and health of your foes.

The void endgame

In the new endgame, the world descends into madness and darkness, with terror moving in the shadows. Only then can you face the machine god and choose your fate.