RimWorld is an indie top-down construction and management simulation video game by Ottawa-based developer Ludeon Studios. Originally called Eclipse Colony, it was initially released as a Kickstarter crowdfunding project in early access for Microsoft Windows, macOS, and Linux in November 2013, and was officially released on October 17, 2018. The game has received generally positive reviews from critics.
The game has a small variety of scenarios to choose from, although the core gameplay is the same. The player characters (referred to as “pawns” in game documentation) are stranded on a procedurally generated planet located in the frontiers of known space (a “rim world”). The characters have a randomly generated set of traits which affect how they can contribute to the colony, the decisions they make, and how their existence affects the other characters. As time goes on, more characters will join the colony. Characters can be rescued after crash-landing on the player map, they can wander in, or they can be captured after a raid. Said colonists might also contain negative traits such as being pyromaniacs or psychopaths.
The game can end when at least one character has escaped the planet on a spaceship, or when they are all dead. With the Royalty DLC, the game can also end by hosting the High Stellarch, leader of one of the factions that inhabit the Rim, and leaving the colony with them. With the Ideology DLC the ArchoNexus ending is made available, which involves selling your colony for part of a map to the ArchoNexus, a massive AI-controlled computer capable of controlling the entire planet.
The objective of the game is to ensure the survival of a colony of people, fighting against various environmental and/or internal events through randomly generated events in a customizable world. As the game progresses events become progressively harder and the player can unlock more advanced technology through research. The game has a top-down, two-dimensional view.