In the vast universe of colony management simulators, few titles have achieved the cult-classic status of Ludeon Studios’ RimWorld. Described by its creator, Tynan Sylvester, as a “story generator” driven by the infamous AI “Storyteller” (Cassandra, Phoebe, or Randy), the game has evolved tremendously since its initial release.
If you have searched for RimWorld 1.4.3901 All DLCs, you are likely looking for the most stable, feature-rich, and complete version of the game available to date. This article dives deep into what patch 1.4.3901 brings, how the three major expansions integrate into it, and why this specific build represents the pinnacle of the RimWorld experience.
RimWorld version 1.4.3901, including all DLCs, offers a rich and immersive gameplay experience. With its complex game mechanics, depth, and replayability, RimWorld is a great choice for fans of colony-building simulations and strategy games.
Biotech is the largest DLC and the reason version 1.4 exists.
RimWorld 1.4.3901 is a specific build of the colony simulation game. Below is concise, structured content covering notable features, changes, and the official DLCs included for that version.
Day 78. A Sightstealer stalks the colony at night — invisible, clawing eyes out. It takes Tuck’s right eye before Vek decapitates it. Tuck now wears a crude eyepatch. He still grows corn by feel.
But the real horror emerges. Lyssa collapses during dinner. Her abdomen bulges. The metal horror bursts forth — a writhing, chitinous mimic of a human spine with too many joints. It shrieks and scuttles into the vent system.
The colony is no longer a settlement. It is a host.
Jin-ho, half-mad from psychic drain, orders a void provocation. He touches the monolith again. A flesh pit opens in the rec room. A Noctol crawls out — blind, weeping black fluid, but its touch melts plasteel. Rimworld 1.4.3901 All DLCs
Vek fights it barehanded after his monosword melts. He kills it. He loses three fingers. He smiles for the first time.
Released first, Royalty integrates a feudal empire that exists beyond your crashed ship's horizon.
Randy Random, unseen, laughs.
Next raid: 37 tribals with poor spears and a lot of anger. But the colony has three plasteel turrets, a psyker with Burden and Stun, and a child who can set fire to a whole raid in fifteen seconds.
The corn grows red next spring. No one asks why.
Would you like a follow-up focusing on the colony’s downfall, a specific character’s backstory, or a modded extension?
version 1.4.3901 is a stable build of the colony simulator that includes the Biotech expansion and various performance refinements. To have "complete content" for this version with all DLCs, your installation should include the following four expansions: Official DLC Expansions
Biotech: The most significant addition for version 1.4. It introduces children and reproduction, genetic engineering (Xenohumans), and the ability to control a swarm of mechanoids as a Mechanitor. In the vast universe of colony management simulators,
Ideology: Adds customizable belief systems. You can define your colony’s culture, ranging from cannibalistic undergrounders to techno-tribal tree worshippers, affecting how pawns react to events and rituals. Royalty
: Introduces a monarchical faction (The Empire), psychic powers (psycasts), and high-tech weaponry/armor. Pawns can earn royal titles and call in Imperial favors. (Note): While
is the newest DLC, it was released alongside Version 1.5. If you are strictly on 1.4.3901,
content will not be available as it requires the 1.5 engine update. Key Version 1.4 Features
Beyond the DLCs, version 1.4 itself brought several "base game" updates that are part of the complete experience:
Painting: The ability to paint walls, floors, and furniture.
Functional Shelves: Shelves were updated to hold up to three stacks of items per tile, drastically changing storage management.
Starting Possessions: You can now customize the specific items and gear your colonists start with more deeply. Would you like a follow-up focusing on the
Performance Improvements: Significant optimizations for mod heavy-save files and pawn pathfinding. Installation Verification
To ensure your content is complete, check the "Mods" menu from the RimWorld main screen. A complete 1.4 setup will show:
Here is the full piece of information regarding RimWorld 1.4.3901 with All DLCs:
Game: RimWorld
Version: 1.4.3901 (current stable build as of early 2023; superseded by 1.5 in 2024)
Included DLCs:
Key features of version 1.4.3901:
How to obtain:
Purchased via Steam, GOG, or directly from Ludeon Studios. The “All DLCs” bundle is listed as RimWorld – Complete Edition on most storefronts.
⚠️ Note: Version 1.4.3901 is no longer the latest. The current version as of 2026 is 1.5.x (Anomaly DLC included). If you need the exact 1.4.3901 for mod compatibility, you can select it via Steam’s “Betas” tab.
Would you like a download/installation guide for this specific version, or help finding mods compatible with 1.4.3901?
Title: The Choir of the Glass Sea
Scenario: A lost tribe of transhumanists stranded on a hostile sea ice shelf. Expansion Coverage: Core, Royalty, Ideology, Biotech, and Anomaly.