If you’re looking for games like The Expanse: Osiris Reborn to play while you wait, start with Mass Effect Legendary Edition as a natural sci-fi RPG to investigate. It is not established here as a one-to-one match, but it is the clearest starting point for readers drawn to a story-led space adventure. Osiris Reborn itself remains upcoming: official listings point to Spring or Q2 2027, with no confirmed release day.
What makes a game feel like The Expanse: Osiris Reborn?
Osiris Reborn is announced as a single-player, story-driven sci-fi action RPG set in The Expanse universe. Its premise follows a Pinkwater Security mercenary caught in a deadly incident on Eros and drawn into a system-wide conspiracy. Players create a captain who is an Earther, Martian, or Belter and lead a crew. [Xbox Wire]
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The most useful way to compare alternatives is to separate the features that define its announced appeal:
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstall- Story and decisions: a central narrative, with choices that can have consequences.
- Crew and companions: relationships with crew members, including support from companions beyond the active squad.
- Combat: third-person, cover-focused action with abilities and real-time squad commands.
- Setting and tone: grounded science fiction rooted in the Solar System and The Expanse universe.
These are announced features, not a report on a finished game. Xbox Wire describes companion support in and out of the active squad; the Steam and PlayStation listings describe crew relationships and consequential choices. [Xbox Wire] [Steam] [PlayStation Store]
#1 Best Overall
- IMMERSIVE STORY: Dive into the Mass Effect universe as Commander Shepard, leading a squad through a Cerberus cruiser to unveil secrets before a massive storm hits Hagalaz.
- DYNAMIC GAMEPLAY: Experience a unique card-driven AI and evolving story that alters based on your choices, ensuring a different gameplay experience with each session.
- DEEP CHARACTER CUSTOMIZATION: Equip and upgrade your squad, including iconic characters like Liara and Garrus, with powerful abilities and gear as you progress through the game.
- COOPERATIVE MISSIONS: Engage in a co-operative, narrative-driven campaign for up to four players, featuring optional loyalty missions that unlock special powers for each squadmate.
- MULTIPLE ENDINGS: A branching narrative with a variety of endings based on your decisions, enhancing replay value and player engagement.
Best starting point: Mass Effect Legendary Edition
Mass Effect Legendary Edition is the most natural candidate to investigate first if what you want is an established science-fiction game while waiting for Osiris Reborn. Space.com has also framed the upcoming game as a Mass Effect-like proposition, and Steam confirms the product listing. That makes it a sensible starting recommendation, not proof that the games share particular mechanics or that the edition is a direct substitute. [Steam] [Space.com]
The sources cited here do not establish the edition’s contents, current regional availability, price, or a detailed feature-by-feature match. Check the platform store in your region for current purchase and edition details before choosing it.
Rank #2
- The Expanse Roleplaying Game brings James S.A. Corey’s award-winning series of science fiction novels to the tabletop.
- Using the Adventure Game Engine (AGE) rules that power Green Ronin’s Fantasy AGE, Blue Rose, and Modern AGE RPGs, The Expanse takes players to a far-future solar system where humanity is divided: Martians, Belters, and the people of old Earth struggle for political power and resources, but older, alien, forces are stirring in the universe, and human history is about to take an unexpected new turn.
- The Expanse RPG applies the fast-playing, stunt-powered AGE system to spaceships, solar colonies, adventure, and intrigue in the far-future, where the actions of the characters may change the course of history!
Other space games to consider
The Outer Worlds and Starfield are additional named games to explore if you want a broader space-game shortlist. The available sources do not establish enough detail to compare their stories, companion systems, combat, or tone with Osiris Reborn, so treat them as options to investigate rather than confirmed close matches. Check their current platform-store listings for availability and features. [Steam] [Steam]
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsIs The Expanse: Osiris Reborn available yet?
No. As of October 4, 2026, Osiris Reborn has not had its full release. Xbox Wire gives a planned Spring 2027 window, Steam lists Q2 2027, and the PlayStation Store lists 2027; none of those listings confirms a specific day. The broad windows align, but release dates can change. [Xbox Wire] [Steam] [PlayStation Store]
Rank #3
- Offers new, streamlined form of gameplay
- Multiple paths of victory offer unique strategy opportunity
- Expansive game engages both new and experienced players
Xbox says the game is planned for Xbox Series X|S, Xbox on PC, and Xbox Cloud; Steam lists PC, and the PlayStation Store lists a 2027 release year. Check the relevant official store page for the latest platform and date information. [Xbox Wire] [Steam] [PlayStation Store]
Can you play the beta?
The closed beta began April 22, 2026, but it is not a general free demo. Owlcat’s published terms require Founder status and ownership of either Miller’s Pack or the Collector’s Edition bought from its official site. Its April 22 update describes an early-game mission with gunplay, skill progression, voiced dialogue, and cut-scenes; Owlcat estimates one to two hours, depending on play style. The update names Steam, Xbox, and PlayStation 5 as beta platforms. Access terms may change, so verify current requirements with Owlcat before relying on beta access. [Xbox Wire] [Owlcat Games]
Rank #4
- THE CLUE GAME, REIMAGINED: This Clue game combines classic Clue gameplay with richly reimagined takes on the original murder mystery storyline, intriguing cast of characters, and glamorous Tudor Mansion
- SOLVE THE MYSTERY: Who killed Boddy Black? Collect clues and race to be the first to figure out who committed the murder, where in the mansion they did it, and what weapon was used
- 6 SUSPECTS, 1 MURDER: Play as Miss Scarlett, Colonel Mustard, Mayor Green, Chef White, Solicitor Peacock, or Professor Plum. Discover their fascinating backstories – and try to uncover their secrets
- ELEVATED GAME COMPONENTS: Includes 6 textured, gold-plated zinc tokens representing the weapons; sculpted character movers; and a beautifully detailed illustrated gameboard and Clue cards
- UNLOCK SECRETS WITH CLUE CARDS: In a game where every character has something to hide, Clue cards help uncover clues faster to speed up the sleuthing! What card will an opponent be forced to reveal?
Also watch: Exodus
Exodus is another announced science-fiction action RPG, but it is not a game to play while waiting: Space.com lists it as TBA 2027. Consider it only if you want another upcoming title to keep an eye on, and check its current status closer to release. [Space.com]
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Best Value
- Create a character to cross the galaxy with and make a name for yourself.
- Take your role amongst the ship crew and travel the vast expanse of space with many special locations and encouters to find.
- Build your deck of skills to complete the many jobs waiting throughout the galaxy.
- Upgrade your ship to be faster, stronger, and more equipped to shoot out all fo your enemies.
- Designed by Jerry Hawthorne, known for his creations Mice & Mystics, Familiar Tales, and Stuffed Fables
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