What is the Simulated Universe in Honkai: Star Rail?
The Simulated Universe is Honkai: Star Rail's signature roguelike challenge mode, built around Herta's research aboard the Herta Space Station. You clear a series of randomly generated domains, pick up Blessings tied to specific Paths, and fight your way to a boss at the end of each World. Lose at the boss and you start the whole run over. It sounds punishing, but once you understand how Blessings stack and which domains to prioritize, runs become far more consistent. The mode has expanded massively since launch, now including the Divergent Universe branch introduced in Version 2.3, which adds Equations, Weighted Curios, and a dedicated Planar Ornament Extraction system.
How do you unlock the Simulated Universe?
Access to the Simulated Universe comes in stages. The introductory adventure missions walk you through the basics before you get full access.
Unlocking Simulated Universe (Part 1)
According to Game8's mission guide, the Simulated Universe (Part 1) Adventure Mission requires two things:
- Reach Trailblaze Level 7 or above
- Complete the Long Wait for the Blade's Edge Trailblaze Mission
If the mission still hasn't appeared after finishing Long Wait for the Blade's Edge, you may also need to complete Simulated Universe: Second Closed Beta first. That mission triggers automatically after you finish the First Closed Beta during the Trailblaze Mission: The Voyage Continues.
Once both conditions are met, head to Herta's Office on the Herta Space Station and interact with the platform to enter.
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The Second Closed Beta mission uses trial versions of the Trailblazer, March 7th, and Dan Heng, so you don't need your own built roster to complete it.
What domains will you encounter in World 1?
World 1 follows a fixed structure that teaches you the domain types you'll see in every subsequent World. Based on Game8's walkthrough, the room order is:
- Combat Domain — defeat enemies to earn random Blessings of Trailblaze
- Elite Domain — a stronger enemy than standard Combat rooms
- Respite Domain — heal, add party members, and upgrade collected Blessings
- Combat Domain — another standard fight
- Occurrence Domain — random events that can buff, debuff, or do nothing
- Respite Domain — heal before the final fight
- Boss Domain — the run-ending encounter; losing here resets the entire run
After clearing the boss, you exit and claim your World 1 rewards.
What rewards does Simulated Universe (Part 1) give?
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These are one-time mission completion rewards. Weekly Simulated Universe clears grant separate Simulated Universe Points that feed into the weekly reward track.What is the Divergent Universe and how is it different?
The Divergent Universe: The Human Comedy launched in Version 2.3 as a permanent branch of the Simulated Universe, developed in-lore by Screwllum. The most recent major update, Divergent Universe: Arcadian Chronicles, arrived in Version 4.1 and introduced Masks, Waypoint Passes, and new Grand Miracles as replacements for the previous Protean Hero system.
The key differences from standard Simulated Universe Worlds:
- Arithmetic Mapping: Your characters, Light Cones, Traces, and Relics are automatically boosted to match your current Equilibrium Level if they fall below it. Underleveled characters still perform at the expected threshold.
- Free character switching: You can swap party members at any time without the roster restrictions that apply in the base Worlds.
- Equations: Stronger than individual Blessings, Equations activate only after you collect enough Blessings from a specified Path. Higher Star Level Equations require more Blessings.
- Weighted Curios: Character-specific or Path-specific Curios that are harder to find but significantly more powerful than standard Curios.
- Trial characters: As of Version 4.1, you can use trial versions of any character released at least two versions prior to the current patch.
- Cyclical Extrapolation resets weekly (every Monday at 04:00 server time), while Ordinary Extrapolation is permanent with five difficulty tiers plus an unlockable Threshold Protocol system after clearing Difficulty 5.
How do you unlock the Divergent Universe?
You need to clear Simulated Universe World 3 first. Game8 also recommends finishing the Trailblaze Mission Stranger in a Strange Land beforehand to get the full context for the story and mechanics.
What rewards can you earn from the Divergent Universe?
The Divergent Universe's main reward track is the Synchronicity Level system. Every 800 Synchronicity Points advances you one level, and the rewards cycle through materials like Stellar Jade, Relic Remains, Lost Crystal, Refined Aether, Tears of Dreams, and Traveler's Guide.
The standout rewards at specific milestones, according to the Honkai: Star Rail Wiki and Game8:
Reaching Level 60 costs a total of 48,000 Synchronicity Points and nets 1,080 Stellar Jade, 2 Tracks of Destiny, and 2 Self-Modeling Resins across the full track, according to the Honkai: Star Rail Wiki.
The Synchronicity Level cap expands periodically. If you hit the cap before an expansion, you stop earning Synchronicity Points until it increases.
What is Planar Ornament Extraction?
This is the Divergent Universe's most practical feature for gearing characters. After clearing a Divergent Universe stage, the game saves your run's Equations, Blessings, and Curios as a Save File. You can then use that Save File to immediately challenge specific bosses and earn targeted Planar Ornaments without grinding the full roguelike loop each time.
Each extraction boss drops two specific Planar Ornament sets. A few examples from Game8's rewards table:
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If you lose a boss fight during Planar Ornament Extraction, you don't lose your Save File. You can retry without rebuilding your entire run from scratch.
What are the best teams for Planar Ornament Extraction?
Team recommendations vary by boss, since each Cyclical Extrapolation favors certain element types. Based on Game8's team data, here are reliable options across several bosses:
Phainon (with Sunday, Cerydra, Permansor Terrae) performs well against Gilded Recollection and Moonlit Blood. Acheron (with Jiaoqiu, Pela, Aventurine or Gallagher) covers Unceasing Strife, Permafrost, Smelted Heart, Untoppled Walls, and Pouring Blades. The Herta (with Anaxa, Tribbie, Aventurine or Permansor Terrae) works across multiple bosses including Unceasing Strife and Famished Worker.
For free-to-play options, every boss has an accessible F2P team. Unceasing Strife's F2P pick is Serval, Herta, Trailblazer (Ice), and Lynx. Moonlit Blood's F2P pick is Dan Heng, Asta, Trailblazer (Ice), and Natasha.
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The Divergent Universe's Arithmetic Mapping system means your characters are scaled up to your Equilibrium Level inside the mode. F2P teams perform better here than they would in Forgotten Hall or Pure Fiction because the level floor is guaranteed.
How does Daily Training connect to the Simulated Universe?
Running the Simulated Universe counts toward Daily Training tasks in the Interastral Guide. According to Push Square's guide, Daily Training unlocks after reaching Belobog's Underworld and completing the Hide and Seek quest. Each task earns points toward five daily milestones that reward Trailblaze EXP and Stellar Jade.
Completing a Simulated Universe run, clearing a Calyx, or leveling a Light Cone are all typical Daily Training objectives. You don't need to finish every task to hit the maximum reward for the day, though the specific requirements rotate daily. Running the Simulated Universe weekly for its point rewards and hitting Daily Training each day covers two of the most consistent Stellar Jade sources in the game.
For more strategies and system breakdowns across Honkai: Star Rail and other games, browse more guides on GAMES.GG.