Choose Eresys
Choose Eresys if you want an Action game with Multi-player. Eresys launched in 2023.
Eresys vs Backrooms: The Last Observer
Eresys and Backrooms: The Last Observer both land in Adventure 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 are Adventure games on Steam. Eresys (2023) is 3 years older than Backrooms: The Last Observer (2026). Backrooms: The Last Observer is currently ~87% cheaper on Steam than Eresys (1.19 USD vs. 8.99 USD). 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 Backrooms: The Last Observer
Choose Backrooms: The Last Observer if you want an Indie, Simulation, and Early Access experience. On Steam, it's currently about 87% cheaper on the Steam Store. Backrooms: The Last Observer launched in 2026.
Both Eresys and Backrooms: The Last Observer sit in Adventure on Steam and both list Online Co-op, LAN Co-op, and Co-op, 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
 Eresys |  Backrooms: The Last Observer | |
|---|---|---|
| Released | 2023 | 2026 |
| Genres | Action, Adventure | Indie, Adventure, Simulation, Early Access |
| Platforms | Windows | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | 8.99 USD | 1.19 USD |
| Steam reviews | 76.9% positive (130 reviews) | — |
| Multiplayer | Multi-player, Online Co-op, LAN Co-op | Online Co-op, LAN Co-op, Co-op |
| Developers | Ares Dragonis | Skmaestro |
Side by side
- Both are Adventure games on Steam.
- Eresys (2023) is 3 years older than Backrooms: The Last Observer (2026).
- Backrooms: The Last Observer is currently ~87% cheaper on Steam than Eresys (1.19 USD vs. 8.99 USD).
- Both support cooperative play.
- Eresys is Deck Playable on Steam Deck; Backrooms: The Last Observer has no Deck rating yet.
Eresys vs Backrooms: The Last Observer — FAQ
- Should I play Eresys or Backrooms: The Last Observer first?
- If you want chronology, Eresys (2023) came out before Backrooms: The Last Observer (2026). 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 Eresys and Backrooms: The Last Observer similar?
- They overlap on Adventure 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.
- Do both Eresys and Backrooms: The Last Observer have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Eresys ships Online Co-op, LAN Co-op; Backrooms: The Last Observer ships Online Co-op, LAN Co-op.
- Does Eresys run on Steam Deck?
- Yes — Eresys is rated Deck Playable by Valve. Backrooms: The Last Observer doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.