Saros Zenith Update: Boss Rush and New Game+ Guide
The free Saros: Zenith update, released on October 19, 2026, adds two major ways to return to Carcosa: Overlord Rush, a boss-rush mode built around timed encounters, and Eclipse Layers, the game’s New Game+ experience. The update also introduces new Carcosan Modifiers, additional collectibles, and accessibility settings.
Although both modes extend the endgame, they serve different purposes. Overlord Rush is designed around defeating bosses quickly and comparing scores, while Eclipse Layers sends players back into a more challenging version of the campaign with modified rules.
Knowing where to access each mode, how the modifier requirements work, and what the rewards and restrictions actually mean will help you choose where to spend your time.
What Does the Saros Zenith Update Add?
Zenith is available to Saros owners at no additional charge. Its main additions include:
- Overlord Rush: Three boss-rush sets, including a continuous challenge featuring all eight Overlords.
- Eclipse Layers: A New Game+ mode that introduces progressively more demanding runs.
- 20 new Carcosan Modifiers: Ten Protection Modifiers and ten Trial Modifiers.
- 12 Visions: Collectibles containing additional story text that becomes accessible through Crown progression.
- New accessibility options: Slow Game Speed, Auto-fire, Motion Sensor Aiming, and High Contrast Display.
- Six new trophies: Additional trophy objectives associated with the update’s new content.
The most important distinction is that Overlord Rush is a separate training simulation, whereas Eclipse Layers expands the campaign experience. You do not use the same menu to access both.
How to Unlock Eclipse Layers New Game+
Eclipse Layers requires you to complete the main Saros campaign first. If you have not cleared the game, start by finishing the main story rather than searching for a hidden entrance to New Game+.
Once the campaign is complete, follow these steps.
- Return to Passage. This is the hub where the post-campaign content becomes accessible.
- Open the Armor Matrix. New nodes appear after you clear the main game.
- Use the new nodes to unlock the next Eclipse Layer. These nodes provide the route to the gate for the new mode.
- Prepare your Carcosan Modifier loadout. Each Eclipse Layer requires you to meet a specified modifier threshold before starting a run.
- Select your Trial Modifiers carefully. You must take on enough challenge modifiers to satisfy the requirement, but the particular Trials you choose are up to you.
- Begin the run once the requirement is met.
What if Eclipse Layers does not appear?
Check the following before assuming the update is broken:
- Confirm that the Zenith update is installed.
- Make sure you have actually completed the main campaign.
- Return to Passage after the campaign clear.
- Inspect the Armor Matrix for the newly added nodes.
- If the Layer is accessible but will not start, check whether your selected Carcosan Modifiers meet its displayed requirement.
The Armor Matrix is the relevant access point for Eclipse Layers. The Primary Unit, by contrast, is where you access Overlord Rush.
How Eclipse Layers and Carcosan Modifiers Work
Eclipse Layers is not simply another trip through the campaign with a different name. Each Layer presents a more intense version of Carcosa with altered rules, and the modifier system determines the conditions under which you play.
Carcosan Modifiers fall into two broad categories.
Protection Modifiers
Protection Modifiers make the experience more forgiving or change the way a difficult mechanic affects you. Zenith adds ten new Protection options.
One example is Corruption Melee Enhancement. Normally, Corruption accumulated from certain enemy projectiles reduces Arjun’s maximum Integrity. With this Protection active, a melee strike against a hostile consumes accumulated Corruption and converts it into additional damage.
The practical implication is that a dangerous status effect can also become a source of offensive power. However, Corruption still carries its underlying risk, so this modifier does not remove the need to avoid incoming attacks.
Trial Modifiers
Trial Modifiers increase the challenge. Zenith adds ten new Trials, and the developer describes a pool of 25 different Trials available for building a loadout.
One confirmed example is Hostile Regeneration. Larger enemies can be stunned by weapon damage, but they recover quickly. A melee strike is required to finish them off.
This changes the way you approach those enemies. Relying only on ranged damage is no longer sufficient: you need to recognise the stun, close the distance, and perform the required melee attack before the enemy recovers.
How to choose Trials without making a run unnecessarily difficult
There is no officially published single best combination for every player. Instead, use the requirement displayed for your current Layer as the starting point.
- Read each Trial’s effect before equipping it. Understand the extra restriction rather than choosing modifiers based on their names alone.
- Look for interactions between Trials. Housemarque warns that some combinations can reinforce each other and create particularly dangerous situations.
- Consider your own combat habits. A Trial that forces you into close-range combat may be especially demanding if you usually depend on keeping your distance.
- Avoid adding difficulty without a reason. Choose Trials that satisfy the required threshold while leaving you able to manage their combined effects.
- Review your loadout after a failed run. Identify which restriction caused the greatest problem before changing several modifiers at once.
These are planning principles based on the documented modifier system, not a claim that a particular build has been personally tested or proven optimal.
What Is the Crown, and How Does It Unlock the 12 Visions?
Eclipse Layers adds a visual Crown to Arjun, accompanied by golden armour. Its appearance changes according to the number of Trial Modifiers you take on and your resulting Modifier Balance.
The Crown is also tied to the update’s additional story collectibles, known as Visions. There are 12 Visions across Carcosa, presented as murals and messages associated with an ancient king.
Some of the additional story text requires a higher Crown level to perceive. This creates a connection between the difficulty you accept and the narrative material you can uncover.
If you want to find all the available story content, do not treat the Crown as merely a cosmetic feature. Pay attention to the Crown level required for the additional text as you progress through Eclipse Layers.
The official announcement does not provide a complete location-by-location walkthrough for all 12 Visions or a full table of their Crown requirements. Avoid assuming that every Vision will reveal all its text at the same difficulty level.
How to Start Overlord Rush
Overlord Rush is a separate mode from Eclipse Layers. To access it:
- Travel to Passage.
- Find the Primary Unit.
- Interact with the Primary Unit.
- Select Overlord Rush.
- Choose the set you want to attempt.
The mode places you in a training simulation against powerful Overlords from the main game. The objective is to defeat them quickly, with scores recorded on an integrated leaderboard.
The three sets are Incursion, Ascension, and Totality.
Incursion vs Ascension vs Totality
| Set | Boss encounters | Best use |
|---|---|---|
| Incursion | Three Overlords | A shorter boss-rush session |
| Ascension | Three Overlords | Another focused set of boss encounters |
| Totality | All eight Overlords in one continuous run | A longer endurance and consistency challenge |
Housemarque says Incursion and Ascension can each be completed in ten minutes. Totality brings all eight Overlords together in one continuous gauntlet.
The available official description identifies the number of bosses in each set but does not provide a complete breakdown of their encounter order or a verified difficulty ranking between Incursion and Ascension. Choose between those two based on the set you want to practise rather than assuming one is categorically easier.
Which Overlord Rush set should you play first?
If you want to practise boss combat without committing to the longest challenge, start with either three-Overlord set. These provide a shorter session in which to work on recognising attacks and maintaining a consistent pace.
Choose Totality when you want to test your ability to sustain performance across the full sequence of eight Overlords. A strong opening encounter is useful, but a continuous gauntlet also requires you to maintain focus through the later fights.
This is a practical way to organise your attempts, not an official progression requirement. The published announcement does not state that you must clear Incursion or Ascension before entering Totality.
How the Overlord Rush Leaderboards Work
Overlord Rush includes an integrated leaderboard that lets players compare their results with friends and other players around the world.
One useful feature is the ability to filter global scores by Main Weapon. This means you can compare your performance with players using the same weapon instead of focusing only on the overall rankings.
To get more value from the leaderboard:
- Check the results for your chosen Main Weapon.
- Compare scores within the same category.
- Use your previous attempts as a reference for improvement.
- Focus on consistency as well as speed when reviewing your runs.
Online leaderboard access requires an internet connection and a PlayStation account. If you are playing without the required online access, you should not expect to submit and compare scores globally.
The official announcement does not explain the exact scoring formula, time bonuses, or penalties in enough detail to establish a definitive leaderboard strategy. Claims about a specific exploit, required weapon, or guaranteed high-score route should therefore be treated cautiously unless supported by reliable evidence.
New Accessibility Settings That Can Help With Difficult Encounters
Zenith is not exclusively an endgame update. It also introduces settings that can help players who struggle with the speed or visual intensity of Saros’s combat.
Slow Game Speed
This setting slows the action, giving you more time to read enemy attack telegraphs and respond to incoming projectiles. You can control how much the game slows down and choose whether the effect activates automatically during combat or is toggled manually.
The attack patterns remain present; the setting gives you more time to react rather than simply removing the attacks.
Auto-fire
Auto-fire makes your weapon fire automatically while you aim at a hostile. This can reduce the need to hold the firing button continuously, leaving more attention available for movement and defensive actions.
However, it does not automate perfect reloads. Those still require a correctly timed button press.
Motion Sensor Aiming
Motion Sensor Aiming adds another way to control aiming and the camera. Players who prefer motion-based control can try it alongside the existing button-remapping options.
High Contrast Display
High Contrast Display provides additional visual separation for Arjun and hostiles. It may help players who find enemies difficult to distinguish clearly during busy encounters.
These settings can be useful in the campaign as well as when practising bosses. If a fight feels overwhelming, consider adjusting the controls or speed before concluding that you must simply play at a higher difficulty level.
Which Mode Should You Play First?
Your choice depends on what you want from the update.
Choose Overlord Rush if:
- You want to revisit boss fights without replaying the whole campaign.
- You prefer short, focused challenges.
- You want to compare scores with friends or other players.
- You want to test your performance with a particular Main Weapon.
Choose Eclipse Layers if:
- You have already cleared the main campaign.
- You want another campaign-style challenge.
- You enjoy building modifier combinations.
- You want to progress toward the Crown and discover additional story text in the Visions.
If you have not finished the campaign, Overlord Rush is the more direct place to start exploring the update’s boss-rush content. Once you have completed the main game, Eclipse Layers provides the longer progression path.
Final Takeaway
The Saros Zenith update adds two distinct endgame experiences. Overlord Rush focuses on timed boss encounters and leaderboard competition, while Eclipse Layers expands the campaign through increasingly demanding runs governed by Carcosan Modifiers.
Use the Primary Unit in Passage to find Overlord Rush, and the Armor Matrix after completing the main campaign to access Eclipse Layers. Before starting a New Game+ run, review the Trial Modifier requirement and understand how your selected restrictions interact. For boss-rush attempts, choose a set that matches the length of challenge you want and use weapon-filtered leaderboard results to track your progress.
Zenith is also an opportunity to adjust how you play. Slow Game Speed, Auto-fire, Motion Sensor Aiming, and High Contrast Display offer additional ways to approach combat without removing the core challenge of reading and responding to enemy attacks.