Obsidian Entertainment has announced its first DLC for The Outer Worlds 2, Side Effects Guaranteed, which will launch part one on December 2, 2026, with part two following in Spring 2027.
- Obsidian Entertainment has officially announced Side Effects Guaranteed, the first two-part story expansion for The Outer Worlds 2, launching on December 2, 2026.
- Securing a copy or upgrade costs under 15 units, delivering substantial savings on digital storefront keys compared to standard retail bundles.
- Raising the level cap to 36 alongside new perks and a fresh alternate start option makes this expansion a mandatory return to Eden.
Commanders across the Halcyon system face a new wave of administrative negligence and biological outbreaks as Obsidian Entertainment officially unveils The Outer Worlds 2 Side Effects Guaranteed DLC, launching on December 2, 2026.
This two-part story expansion invites players to investigate the derelict research vessels of the Elysium Valley region, navigating dangerous corporate rivalries while managing the newly raised level cap of 36.
What Awaits Commanders in the New Elysium Valley Region?
The Elysium Valley region introduces a dense narrative arc centered around a derelict corporate research vessel and a suspended animation crew infected by an aggressive mutating virus.
Players navigate a high-stakes political squeeze between competing corporate factions, specifically monitoring the friction between Sub Rosa agents Gordon and Algernon Lankester.
Obsidian Entertainment structures this first chapter to test moral boundaries, forcing difficult choices that ripple directly into the upcoming second part scheduled for Spring 2027.
How Do the Level Cap Increase, New Perks, and Alternate Start Feature Work?
The Side Effects Guaranteed expansion reworks core progression metrics by pushing the level cap to 36, adding over 15 new perks, and introducing specialized companion outfits.
The system update also features a dedicated Sub Rosa radio station loaded with 20 tracks, plus a main menu alternate start option that lets players drop directly into the expansion content using a custom level 27 preset save.
Is Side Effects Guaranteed Worth Your Time and Money?
Side Effects Guaranteed delivers a robust expansion package for The Outer Worlds 2 that respects both player time and investment.
The narrative depth of the Elysium Valley region, combined with meaningful mechanical upgrades like the level 36 cap and alternate start options, provides compelling value.
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