's Biotech DLC, creating a custom xenotype allows you to tailor your colonists' genetics to specific roles or thematic challenges
. Whether you want a race of specialized mountain miners or psychic super-soldiers, the Xenotype Editor is your starting point. Creating Your Xenotype
You can create a custom xenotype at the start of a new game or mid-save using genetic infrastructure. At Game Start: In the "Create characters" menu, select the Xenotype editor
. Here, you can add or remove genes to create a unique template for your starting colonists. To modify existing colonists, you must use a gene assembler to create a
, which is then implanted into a pawn. This process requires gathered genepacks and sufficient gene processors. Genetic Balance: Each gene has a cost or benefit to Metabolic Efficiency Complexity
. A negative metabolic efficiency means your colonists will need significantly more food. Creative Xenotype Ideas
Players often use the editor to create themed factions or hyper-specialized workers:
In the RimWorld: Biotech DLC, creating custom xenotypes is a powerful way to define your colony’s theme or "min-max" your way to survival. Based on community discussions from Reddit and Steam, here are some of the most interesting and effective xenotype concepts. 1. High-Performance Themes
These builds focus on extreme efficiency by combining powerful buffs with easily managed downsides.
The "Chemical Empire" Battlemate: Combines Go-juice dependency and Psychite dependency with Robust and Darkvision. Since chemical dependency prevents random addictions, your pawns can stay permanently "juiced" without health risks.
The Ultimate Mechanitor: Optimized for solitary automation. Notable traits include Low sleep (to keep the base running), Elongated fingers (for better manipulation), and Great Crafting.
The Immortal Sanguophage: A refined "perfect" vampire that removes weaknesses like Pyrophobia and UV Sensitivity by trading off high metabolic costs for Strong Melee and Superfast Wound Healing. 2. Unique Gameplay & RP Themes
These xenotypes lean into specific roleplay scenarios or environmental challenges.
"Plant People" (Photosynthesizers): Designed for tribal starts where you leave roofs off buildings. They gain energy from the sun but are often made Weak to Fire or dependent on Alcohol.
Deep-Sea Fishfolk: Built using mods like Alpha Genes , these pawns move faster in water and have Wet Scales. This allows you to build "island" colonies that are nearly impossible for standard raiders to kite.
"The Geth" (DnD Githyanki): A raider-themed xenotype with Fast Walker and Saurid egg-laying. They are built for a nomadic, aggressive lifestyle but suffer from Poor Social and Artistic skills. 3. Creating Your Own: Tips for Success
When using the Gene Editor , consider these community-vetted "free points":
Creating a custom xenotype in the DLC allows you to balance powerful traits with manageable flaws to suit your colony's specific goals. 🧬 Core Mechanics to Master
Understanding the balance between Metabolism, Complexity, and Archite Genes is essential for any build.
Metabolism: Determines how much food your pawns need; positive numbers reduce hunger, while negative numbers increase it.
Complexity: Limits how many genes can be combined in a single xenotype.
Heritability: You can choose between "Germline" (passed to children) or "Xenogenes" (implanted via xenogerm and not heritable).
Archite Genes: These special "super-genes" like Deathless or Ageless require rare Archite Capsules and do not affect metabolism. 🛠️ Community-Favorite Custom Builds rimworld create xenotype
Players often design xenotypes around specific themes or "OP" survival strategies. The "Melee God" (Combat Specialist)
Designed to survive the front lines of a raid with extreme durability.
Key Genes: Robust, Strong Melee Damage, Reduced Pain, and Superfast Wound Healing.
Trade-offs: Take Awful Cooking or Awful Social to gain metabolism points. The "Arctic Fur-Kin" (Cold Survival)
Perfect for "sea ice" or tundra maps where heating is a luxury. Key Genes: Furskin, Cold Tolerance, and Strong Immunity.
Playstyle: You can ignore heating in your base, causing raiders to freeze to death before they reach your doors. The "No-Sleep Worker" (Maximum Productivity) Focuses on 24/7 labor to keep the base running. Key Genes: Never Sleep or Low Sleep.
Note: Low Sleep is often better than Never Sleep because pawns still get "Comfort" and mood bonuses from using a bed for a few hours. 💡 Pro Tips for Creation
Free Metabolism: If you use a Nutrient Paste Dispenser, the Awful Cooking gene is essentially "free" points since you don't need a cook anyway.
Xenotype Spawning: By default, custom xenotypes won't appear in the world unless you start with them; use the Alpha Genes mod or Xenotype Spawn Control to see them on raiders or traders.
Genetic "Bank": You can create xenogerms of single cosmetic genes to sell to traders for easy silver.
For a visual walkthrough of the best vanilla traits and how to balance them, check out this guide:
, creating a custom xenotype is a core feature of the Biotech DLC. You can build your own genetically modified species from scratch during the game setup or by modifying pawns mid-game using a Gene Assembler. Creating a Xenotype During New Game Setup
When starting a new scenario, you can define exactly what your starting colonists are:
Select Colonist: In the "Create characters" screen, click on the Xenotype name next to a colonist's background.
Open Editor: Select the "Create custom..." option at the top of the xenotype list to open the Xenotype Editor.
Choose Genes: Pick from hundreds of genetic traits (e.g., Fur-skinned, Fire-spewing, Super-fast runner).
Metabolic Efficiency: Each gene has a cost. "Good" genes (like high combat skill) lower efficiency, requiring the pawn to eat more often. "Bad" genes (like UV sensitivity) increase efficiency, allowing for more powerful builds.
Save Xenotype: Give your creation a name and icon. You can save it to use in future playthroughs or apply it to other starting pawns. Creating Xenotypes Mid-Game (The Gene System)
If you are already playing, you don't "create" a xenotype in a menu; you engineer it:
Extraction: Use a Gene Extractor on captured enemies or your own colonists to pull out specific "genepacks."
Storage: Keep your collected genes in Gene Banks so they stay viable.
Assembly: Use a Gene Assembler to combine multiple genepacks into a single Xenogerm. 's Biotech DLC, creating a custom xenotype allows
Implantation: Use a medical operation to implant that Xenogerm into a colonist. This overwrites their existing xenogenes (but not their germline genes) and officially changes their xenotype to whatever you named your custom creation. Key Terms for the Feature
Germline Genes: Permanent genes passed down to children (like a Pigskin’s snout).
Xenogenes: Artificial genes implanted later in life; these are not typically inherited.
Complexity: The more genes you add, the more Gene Processors you need connected to your assembler to handle the data.
To see the visual interface and gene list in action, you can check the Official RimWorld Wiki Biotech Page.
Creating a custom xenotype in is the ultimate "mad scientist" moment. It’s where you stop playing a survival sim and start playing an evolutionary architect. Whether you want to build a race of immortal, fire-breathing super-soldiers or a colony of delicate, fast-learning researchers, the Xenotype Editor is your canvas.
Here is a breakdown of how to master the art of the custom xenotype: 1. Accessing the Editor You don’t need a high-tech lab to start. During the Scenario Setup
, when you are choosing your starting colonists, click on the
button (which usually says "Baseliner" by default). From there, you can select "Create New" to open the editor. This allows you to define the genetic blueprint for your starting pawns. 2. The Gene Hierarchy Genes come in two flavors: Germline Genes:
These are "natural" and passed down to children. If you want a self-sustaining race, build these. Xenogenes:
These are implanted (via the Biotech DLC's gene assemblies) and are typically not inheritable. 3. Balancing Metabolic Efficiency
This is the most critical mechanic. Every "powerful" gene (like Superfast Wound Healing Metabolic Efficiency The Penalty:
If your efficiency is low (e.g., -5), your colonists will need to eat significantly more food—sometimes 225% of a normal human's diet.
To balance high-tier abilities, you must pick "weakness" genes. Taking Slow Runner Extra Pain
adds points back to your efficiency, allowing you to afford the "god-tier" traits without your colony starving in the first winter. 4. Archetype Ideas to Try The 'Frost-Walkers': Ice Breath Cold Tolerant . Perfect for Sea Ice playthroughs. The 'Nocturnals': Dark Vision UV Sensitivity Strong Melee . They’ll rule the night and hide in caves by day. The 'Eternal Researchers': Great Intellectual Low Libido (to stay focused!), and to save points. 5. Mid-Game Evolution
Don’t worry if you didn't get it perfect at the start. Once you build a Gene Assembler
, you can harvest genes from prisoners or buy them from traders like the RimWorld Wiki's guide on Gene Engineering
suggests. You can eventually "rewrite" your colonists mid-save using xenogerm injectors. gene build for a certain biome, or should we look at the best negative genes to take for extra points?
Creating custom xenotypes in (Biotech DLC) allows you to design unique human subspecies by manipulating their genetic code. Whether you want to roleplay as specialized mountain-dwellers or min-maxed super-soldiers, the xenotype editor is your primary tool. How to Create a Xenotype
The easiest way to design a custom race is through the starting pawn selection screen when beginning a new game.
Open the Editor: On the colonist selection screen, click the "Baseliner" button (or current xenotype name) in the top right of a pawn's profile.
Access Customization: Select "Create custom" or click the "Xenotype Editor" button. Choose Genes: Pick from various gene categories. Germline Genes: Inherited by children (endogenes). Genes: Fast Runner, Great Shooting, UV Sensitivity (Major),
Xenogenes: Implanted "genetic bionics" that are not inherited.
Manage Metabolism: Balance powerful buffs with negative traits. Positive metabolism (from negative genes) reduces food requirements, while negative metabolism (from powerful buffs) increases hunger.
Save and Apply: Name your creation and save it to use for your starting colonists. Top Genetic "Cheat Codes" (Min-Maxing)
Veteran players often use specific gene combinations to create "ultimate" xenotypes:
The Immortal Tank: Combine Deathless, Scarless, and Ageless. To pay for these, take Major Cell Instability—it is completely countered by the ageless traits.
The Low-Maintenance Worker: Use Psychite Dependency. It prevents addiction while only requiring one dose every five days, providing a massive metabolism boost for minimal effort.
The Raw Eater: Pair Strong Stomach and Robust Digestion to allow pawns to eat raw food without illness or mood penalties, effectively removing the need for a cook. Community-Favorite Concepts
"Razorbacks": Tribal boar-folk with Strong Melee Damage, Robust, and Unstoppable for all-out aggressive combat.
"Scabtabbies": High-efficiency mechanitor cat-people designed for solo mountain base management.
"Deer Elves": Outdoor-focused specialists with Shooting and Social buffs, designed for Tree Connection ideologies. Advanced Spawning
By default, custom xenotypes only appear if you start with them. To see them in the wild, players often use mods:
Let’s walk through creating a classic combat xenotype: "The Juggernaut."
Goal: A melee tank who never sleeps and feels no pain.
Step 1: The Core Metabolism You need points to buy good genes. Start with "Awful Skill (Mining)" . If your pawn isn't a miner, tanking their mining skill gives +2 metabolic efficiency. Do this for two useless skills (e.g., Artistic and Animals).
Step 2: The Combat Package
Step 3: The Quality of Life
Step 4: The Fixes
Result: A slow-moving, but heavily armored, sleepless berserker who eats like a horse (negative metabolic efficiency means they need more food).
Before you open the editor, you need to understand the biology of Biotech.
When you use the "RimWorld create xenotype" feature in the character selection screen, you are creating a custom Xenotype—a set of Xenogenes applied to a baseline pawn.
Interact with the Gene Assembler and select "Create Xenotype." You will be presented with a UI to select genes.
The Balancing Act: