Choose Mass Effect (2007)
Choose Mass Effect (2007) if it matches what drew you to this matchup. 9,548 Steam reviews back the pick.
Mass Effect (2007) vs The Expanse: Osiris Reborn
Mass Effect (2007) and The Expanse: Osiris Reborn both land in Action, RPG on Steam, which is why they keep getting compared. The comparison below is built from each game's Steam metadata — release year, genres, categories, Steam Deck status, price, and review score — refreshed daily by imho.run's scraper. Headline differences: Both share Action, RPG on Steam. Mass Effect (2007) (2008) is 19 years older than The Expanse: Osiris Reborn (2027). Mass Effect (2007) is Deck Playable on Steam Deck; The Expanse: Osiris Reborn has no Deck rating yet. No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.
Which should you pick?
Choose The Expanse: Osiris Reborn
Choose The Expanse: Osiris Reborn if you want an Adventure experience. On Steam, it's the newer release (2027) and ships with the modern feature baseline. The Expanse: Osiris Reborn launched in 2027.
Both Mass Effect (2007) and The Expanse: Osiris Reborn sit in Action and RPG on Steam, so either pick lands in the same broad neighborhood. Use the side-by-side table for the feature view, or follow the "Games like" links below to see ranked alternatives for either title.
Side-by-side comparison
 Mass Effect (2007) |  The Expanse: Osiris Reborn | |
|---|---|---|
| Released | 2008 | 2027 |
| Genres | Action, RPG | Action, Adventure, RPG |
| Platforms | Windows | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | 5.99 USD | Price unknown |
| Steam reviews | 93.8% positive (9,548 reviews) | — |
| Multiplayer | Single-player only | Single-player only |
| Developers | BioWare | Owlcat Games |
Side by side
- Both share Action, RPG on Steam.
- Mass Effect (2007) (2008) is 19 years older than The Expanse: Osiris Reborn (2027).
- Mass Effect (2007) is Deck Playable on Steam Deck; The Expanse: Osiris Reborn has no Deck rating yet.
Mass Effect (2007) vs The Expanse: Osiris Reborn — FAQ
- Should I play Mass Effect (2007) or The Expanse: Osiris Reborn first?
- If you want chronology, Mass Effect (2007) (2008) came out before The Expanse: Osiris Reborn (2027). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
- Are Mass Effect (2007) and The Expanse: Osiris Reborn similar?
- They overlap on Action, RPG on Steam, so the catalogue groups them together — but "similar" depends on the specific mechanics. Use the genre + category rows above to decide whether the overlap matches what drew you to the one you've already played.
- Does Mass Effect (2007) run on Steam Deck?
- Yes — Mass Effect (2007) is rated Deck Playable by Valve. The Expanse: Osiris Reborn doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.