Deviations are the Stardust-altered creatures you secure and put to work in Once Human. This guide covers the parts that depend on the scenario, the mode and the version. They are Deviation fusion, the Deviation: Survive, Capture, Preserve scenario (DSCP), what the notes say about RaidZone, and the Aberrant Progeny vision. The beginner guide explains what Deviants and Deviations are and what the three Deviation types do, so this page does not repeat that. Start with the beginner guide if you are new.

Everything comes from the developers’ version notes and dev blogs, read on November 6, 2026. The latest version is 3.1.2 (November 4, 2026). Nothing was played or tested for this page. Each rule is tied to the version whose notes state it. Version 3.1.2 does not restate most of them. An older rule is what the notes said then, not a confirmed description of today’s game.

Terms that changed

Version 2.3.1 (January 21, 2026) renamed several terms. Otherworldly Lifeforms, Superiors and Root Avatars became “Prime Deviants”. The Isolated Securement Unit became the “Securement Pod”. Older guides still use the old words. Some updates also use “Morphed Deviations” for special versions of Deviations that come with visions and scenarios.

Who can fuse: the scope of the rule

Fusion has a scope, and it is not “every scenario”.

• What the notes say. The version 2.1.4 notes (September 24, 2025) introduced fusion in the Early Access of DSCP. They state that “Deviation fusion will be available in all non-RaidZone scenarios”. The preview of September 19, 2025 had said fusion would debut “in all scenarios”, without the exception. The 2.1.4 note is the later one, and it adds the exception.
• RaidZone. The 2.1.5 notes (October 15, 2025) list a fusion change as “Not applicable in RaidZone Mode”. So fusion is outside RaidZone. RaidZone was later split into Casual, Standard and Hardcore (version 2.3.7, April 22, 2026). The notes read for this page do not restate the rule for each mode.
• Other scenarios. The notes read list no exception among the non-RaidZone scenarios, for example for Manibus (Novice). This guide claims none. It does not confirm that fusion is open on each server either. The in-game screens decide.

How fusion works

These rules come from the September 19, 2025 preview, and later notes adjusted details.

• You fuse two Deviations, and you can also fuse them with animals and furniture. The result randomly inherits its type and trait from the source Deviations.
• The source Deviations are not consumed, but each source can be fused only once. Extra fusion materials, such as other Deviations or furniture, change the result probabilities or can add new traits. Those materials are consumed.
• Version 2.1.5 reduced the chance of lowering Skill Rating and Activity Rating during fusion (non-RaidZone). The 2.2.0 bug-fix notes of October 30 and November 2, 2025 fixed cases where the Activity Rating displayed or dropped wrongly.
• Version 2.2.2 (November 26, 2025) made scenario-specific passive traits a separate category, to prevent conflicts when fusing. It also let female deer and sheep be used. Version 2.2.4 (December 23, 2025) added fusion results for certain fish and the Deviation “Hydronaut Fish”.
• Fusion happens in a Fusion Pod. In the Meta Hotline of August 6, 2026, the developers said they would not add more Fusion Pods for now. In the Hotline of June 11, 2026, they gave an attribute filter for fusion a higher priority, expected in the second half of the year. That is a plan, not a feature read in the notes.
• In Isles of Abyss, the 2026 notes say its Morphed Deviations support fusion.

Deviation: Survive, Capture, Preserve

DSCP has its own rules. These facts come from its early access and launch notes (September and October 2025). Some were adjusted later.

• Stand-alone. The launch notes (October 24, 2025) say it is a stand-alone scenario, so your stats from other scenarios do not apply.
• Its own battle rules. The early access preview says DSCP has unique Deviation battle rules. Deviations you bring in have their skills and stats adapted, and some were not yet available there.
• Capturing. The version 2.2.0 notes (October 29, 2025) describe crafting specialized capture devices and studying how Deviations appear across the world.
• Symbiosis System. Your Symbiosis Level decides how strong your captured Deviations are. The level cap was raised from 5 to 10, and early levels needed less value. Tech unlocks in the scenario (named Memetics at the time) follow the Symbiosis Level, not the scenario phase. A Deviation’s information shows recommended lineups, skills and its habitat.
• Battles. You build a team of up to three Deviations. You can challenge NPC arenas, or other players in real-time matches. The launch notes say arena matchmaking considers Symbiosis Level.
• Skins. Version 3.0.3 (August 5, 2026) added skin equipping for Deviations placed in Territory securement units.

Where Brave George comes from

Brave George, a Combat Deviation added in version 2.3.5 (March 25, 2026), shows how scenarios differ. In DSCP you explore the wilderness to obtain it. In other scenarios you defeat the Forsaken Giant.

RaidZone

The RaidZone preview of July 28, 2025 says RaidZone blueprints, accessories and most Deviations are exclusive to that mode. That note predates the split into Casual, Standard and Hardcore (version 2.3.7). The notes read for this page do not restate it for each mode. Treat it as 2025 history, and check your mode before you plan around it.

The Aberrant Progeny vision (history)

Visional Wheel S3, Aberrant Progeny, started with version 2.3.1 (January 21, 2026). The notes list these affected scenarios: Manibus (excluding the novice scenario), Evolution’s Call, Prismverse’s Clash, The Way of Winter, Endless Dream and DSCP.

• High-level Pollution Zones became “Deviant Zones”, and “Deviant Sprouts” let players seek a symbiosis with the enemy’s power. This is the vision’s own mechanic. It is not the Symbiosis System of DSCP, which is a separate progression.
• Deviant Chests could give the Morphed Deviations Rain Man, Snow Globe, Rebecca, Growshroom, Dr. Teddy and Upper World Spawn. The notes add special loot rules for DSCP.
• S4, Gravity Abyss, arrived with version 2.4.1 on May 27, 2026. The 2.3.7 notes had said S3 was nearing its end. The 3.1.2 notes say the next Visional Wheel is about to turn.

These details are historical and do not apply to the vision active now. Check the Events screen, under Visional Wheel.

Common mistakes

• Saying fusion is for every scenario. The notes limit it to non-RaidZone scenarios.
• Mixing two Symbiosis ideas. The Symbiosis System belongs to DSCP, and Deviant Sprouts belong to the S3 vision.
• Using old terms. Memetics, Isolated Securement Unit and the “Otherworldly” names changed in 2.3.1.
• Carrying RaidZone’s 2025 exclusivity rule into other modes. It predates the mode split.
• Treating S3 rules as current. They ran with that vision.

What this guide does not cover

• What the three Deviation types do: the beginner guide covers that.
• A ranking, tier list or best team. Nothing was played or tested.
• Individual Deviation stats and battle skills, which the developers rebalance in version notes.
• Any change after the 3.1.2 notes of November 4, 2026.

Sources named in the text: Steam community announcements for Once Human (the DSCP early access preview of September 19, 2025, version notes 2.1.4, 2.1.5, 2.2.0, 2.2.2, 2.2.4, 2.3.1, 2.3.5, 2.3.7, 2.4.1, 3.0.3, 3.1.2, the DSCP launch notes of October 24, 2025, the RaidZone preview of July 28, 2025, the Meta Hotlines of June 11 and August 6, 2026 and the Isles of Abyss notes of October 21, 2026).