The Outer Worlds 2's First Expansion Trailer Reveals Elysium Valley and New Threats

Obsidian Entertainment has pulled back the curtain on the first story expansion for The Outer Worlds 2, releasing a reveal trailer on November 10 for Side Effects Guaranteed. The clip leans into the series' trademark corporate satire from its opening seconds, built around a grinning, melting moon-headed mascot in a top hat who serves as the expansion's mascot and tone-setter, before cutting to the mutated creatures and crumbling settlement the player will actually have to deal with.

A Distress Signal Opens the Door to Elysium Valley

The story kicks off when the crew of the Incognito picks up a distress signal from a derelict ship. A recovered recording from the vessel's captain reveals the crew was contaminated during a heist and is heading toward a gruesome fate the game dryly describes as more liquefaction than explosion, though the result is the same either way. Tracking the signal leads the player to Gordon Hazen, a Sub Rosa agent who favors diplomacy over violence, and from there into the new region of Elysium Valley, a former Protectorate settlement now caught in a power struggle. A second Sub Rosa agent, Algernon Lankester, wants to exploit the settlement's former subjects for his own gain, and it is left to the player to decide the fate of the valley, its frozen crew, and Sub Rosa itself.

Five New Guns for the Job

Side Effects Guaranteed adds five new weapons alongside the usual arsenal of an Earth Directorate Commander. They include:

• The Immobilizer, which suspends a target in zero gravity so the player can swap weapons and finish them off, or pair it with grenades and the Tactical Time Dilation device for slow-motion crowd control
• The 1/6 Resolver, which lands an extra-powerful hit on every sixth bullet fired
• A weapon with bonus damage against creatures, aimed at the valley's more hostile wildlife
• A novelty Tossball Stick
• A new plasma weapon

The expansion also adds new armor sets and fresh outfits for every companion, giving returning crew members a new look to match the new setting.

Level Cap, Perks and a New Radio Station

Progression gets a bump alongside the new gear: the level cap rises from 30 to 36, with 15 new perks, three of which only unlock at the higher levels. Four new flaws join the list as well, including Lethally Tolerant, which raises max toxicity but causes instant death on a Toxicity Crash, and Must Have Been the Wind, which marks a target for assassination and grants a temporary damage and speed buff on a clean kill, or a matching debuff on a failed or mistaken one. Elysium Valley also comes with its own soundtrack, a new Sub Rosa radio station carrying 20 original songs for players exploring the region.

Building on a Launch Full of Dark Comedy

The Outer Worlds 2 launched in October 2025 as Obsidian's follow-up to its 2019 original, carrying over the first game's blend of first-person shooting, branching dialogue, and sharp jabs at unchecked corporate power, this time set in the Arcadia system rather than Halcyon. Elysium Valley sits on Eden, a location within that same system where the base game's story already plays out, so the expansion is sending players back to familiar ground rather than opening up an entirely new world. Side Effects Guaranteed is the studio's first major piece of post-launch story content for the sequel, and the trailer makes clear it intends to keep that same tone intact rather than soften it for an expansion. The melting mascot standing in for the DLC's marketing is a small joke with a large footprint: it is the first thing most players will see, and it immediately signals that Elysium Valley's crisis is being played for the same uneasy laughs as the rest of the series.

That consistency matters for a sequel that is still being judged against its predecessor's reputation for letting player choices reshape entire settlements. By tying Side Effects Guaranteed's outcomes directly into a confirmed second DLC, Obsidian is betting that players who finish the first expansion will want to see how their decisions about Gordon Hazen, Algernon Lankester, and the fate of Elysium Valley ripple forward.

Where to Find It, and What Comes Next

Side Effects Guaranteed is the first half of a two-part narrative expansion and launches December 2 for $14.99 on Steam, or at no extra cost for owners of the Premium Edition or Premium Edition Upgrade. A quick-start option on the main menu lets new players jump straight into the DLC with a pre-built character rather than replaying the full campaign first. Decisions made across Side Effects Guaranteed will carry over into part two, which Obsidian has scheduled for spring 2027, meaning the choices players make in Elysium Valley this December should have consequences well into next year.

For a game built on branching consequences and corporate skewering, pairing a cheerfully disintegrating mascot with a settlement-wide moral dilemma feels entirely on brand. Whether Gordon Hazen's diplomacy or Algernon Lankester's exploitation wins out in Elysium Valley is now up to whoever logs in on December 2.

Obsidian's reveal trailer for The Outer Worlds 2: Side Effects Guaranteed, posted to PlayStation's official YouTube channel on November 10, 2026.