Side Effects Guaranteed in the First DLC For The Outer Worlds 2, Coming December 2

Xbox Wire and other outlets reported that Side Effects Guaranteed is the first chapter of a two-part narrative DLC expansion for The Outer Worlds 2. According to Xbox Wire, a distress signal draws your crew on the Incognito to a derelict ship where the crew is in suspended animation after contracting an infection causing explosive cell death, described by the captain as a liquefaction. This hunt for a cure leads players to Elysium Valley, a new region on Eden inhabited by forgotten former subjects of the authoritarian collectivist faction the Protectorate, as detailed by Rock Paper Shotgun and Xbox Wire.

In Elysium Valley, players must navigate a conflict between two agents of the black-market smuggling organization Sub Rosa. Xbox Wire stated that Gordon Hazen favors diplomacy and wants to save the frozen crew, while Algernon Lankester wants to exploit the subjects for personal gain. Your decisions will decide the fate of the settlement, the frozen crew, and the future of Sub Rosa, with choices carrying over directly into the next DLC scheduled for Spring 2027. Side Effects Guaranteed is available standalone for $14.99 or through the Premium Edition and Premium Edition Upgrade, as reported by Xbox Wire and Video Games Chronicle.

Alongside the new story content, the expansion introduces gameplay updates and new threats such as vicious canids and primal sprats, which Xbox Wire described as normal sprats about 100 times the size. The level cap increases from 30 to 36, granting additional skill points alongside 15 new perks and three new level opportunities. Four new flaws are also added, including Lethally Tolerant, which raises max toxicity but causes instant death during a Toxicity Crash, and Must Have Been the Wind, named after the stealth meme in Bethesda and Obsidian games. Rock Paper Shotgun noted that an accompanying update will add options to respec character skills and edit skill points per level up.

Additional additions include new weapons, armors, outfits for companions, and a Sub Rosa-run radio station featuring 20 new songs. For players wanting immediate action, a main menu alternate starting point allows a custom save directly at the DLC's beginning. Rock Paper Shotgun and Video Games Chronicle provided background on Obsidian's recent corporate context following Microsoft staff layoffs, a merger with Bethesda, and a pivot to a new Fallout game, leaving the future of original intellectual properties like The Outer Worlds uncertain. Video Games Chronicle noted that Xbox allowed Obsidian to complete its post-launch work on The Outer Worlds 2 rather than abandoning it entirely.