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Outer Worlds 2: Side Effects Guaranteed DLC Release Date & Details
Developing
Photo: gameluster.com (from the cited article) All clips and posts below are embedded from their original sources.
By the numbers: this timeline documents 2 events, drawn from 3 sources.
“Part one of this overarching expansion story, Side Effects Guaranteed, will release on December 2 for $14.99.”
via gameluster.com
Our take
The confirmation of Side Effects Guaranteed on December 2 resolves a year of uncertainty following the October 2025 launch, where the DLC was bundled into the $100 Premium Edition without a release date. This move validates the paid add-on model for Obsidian's post-launch support, specifically introducing the level cap increase to 36 and the Elysium Valley region.
Background
The Outer Worlds 2 launched on October 29, 2025, with the Side Effects Guaranteed expansion bundled into the game’s $100 Premium Edition. A year passed with no word on the expansion while Microsoft restructured its studios, leading fans to worry it had been shelved.
The announcement arrives amid reports that Obsidian Entertainment now sits under Bethesda’s direct management and has been pointed toward Fallout work, though Xbox and Obsidian have not confirmed those reports. The expansion is the first half of a two-part narrative adventure, with choices from part one carrying directly into the second part scheduled for spring 2027.
The timeline
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Xbox announced Side Effects Guaranteed release date and price
Xbox reportedly announced that the first story expansion for The Outer Worlds 2, Side Effects Guaranteed, launches on December 2 for $14.99 on Xbox Series X|S, PlayStation 5, and PC. The paid add‑on is also said to be included with the game’s Premium Edition and Premium Edition Upgrade.[1]
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PlayStation Blog details Elysium Valley and new weapons
The PlayStation Blog reportedly described the expansion's story, which begins when the crew of the Incognito receives a distress signal from a derelict ship. The search for a cure reportedly leads players to Elysium Valley, a new region on Eden, featuring five new weapons including the Immobilizer and the 1/6 Resolver.[3]
Our read of the evidence
Mostly unverified. No primary source has confirmed the announcement; both the release date and the PlayStation Blog details rest solely on reports from gameluster.com and playstationlifestyle.net. Neither the publisher nor the developer has spoken on the record about the expansion. The December 2 launch remains pending.
Our rating counts evidence, not opinions about anyone: events confirmed by a primary source (the person's own post, their official site, a court or government record) weigh most, then how many independent outlets report the story.
What happens next
December 2, 2026: Side Effects Guaranteed expansion launches on Xbox Series X|S, PlayStation 5, and PC, according to Xbox.
Frequently asked
When does Outer Worlds 2 Side Effects Guaranteed release?
The expansion launches on December 2, 2026, according to Xbox. It is available on Xbox Series X|S, PlayStation 5, and PC for $14.99.
How much does the Outer Worlds 2 DLC cost?
Side Effects Guaranteed costs $14.99, according to the announcement. It is also included with the game’s Premium Edition and Premium Edition Upgrade.
What new content does Side Effects Guaranteed add?
The DLC adds a new region called Elysium Valley, raises the level cap from 30 to 36, and introduces more than 15 new perks, four new Flaws, and five new weapons, according to Xbox Wire.
Is the Outer Worlds 2 expansion a single release?
No, it is the first half of a two-part narrative adventure, according to Xbox. Part two is scheduled for spring 2027, with choices from part one carrying directly into it.
More related drama (4)
Sources (3)
Cite this timeline
This timeline compiles 2 dated events from 3 sources. If it helped your reporting, cite it:
GenZHype. “Outer Worlds 2: Side Effects Guaranteed DLC Release Date & Details.”
GenZHype, 12 November 2026,
https://genzhype.com/gaming/outer-worlds-2-side-effects-guaranteed-dlc-release-date-details/.