Choose The Assembly
Choose The Assembly if it's Steam Deck Verified, so handheld play works out of the box. The Assembly launched in 2016.
The Assembly vs Mirrors Castle
The Assembly and Mirrors Castle both land in Indie, 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 share Indie, Adventure on Steam. The Assembly (2016) is 10 years older than Mirrors Castle (2026). Mirrors Castle is free; The Assembly is paid (29.99 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 Mirrors Castle
Choose Mirrors Castle if you want an Action and Free To Play game with Multi-player, Online Co-op, and DualShock Controller Support. On Steam, it's free to play, so the barrier to trying it is zero. Mirrors Castle launched in 2026.
Both The Assembly and Mirrors Castle sit in Indie and Adventure on Steam and both list Tracked Controller Support and VR Supported, 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
 The Assembly |  Mirrors Castle | |
|---|---|---|
| Released | 2016 | 2026 |
| Genres | Indie, Adventure | Action, Indie, Adventure, Free To Play |
| Platforms | Windows | Windows, Linux |
| Steam Deck | Deck Verified | Unrated |
| Price | 29.99 USD | Free to play |
| Steam reviews | 68% positive (97 reviews) | — |
| Multiplayer | Single-player only | Multi-player, Cross-Platform Multiplayer, Online Co-op |
| Developers | nDreams | Siorinex |
Side by side
- Both share Indie, Adventure on Steam.
- The Assembly (2016) is 10 years older than Mirrors Castle (2026).
- Mirrors Castle is free; The Assembly is paid (29.99 USD).
- Mirrors Castle has co-op; The Assembly does not.
- The Assembly is Deck Verified on Steam Deck; Mirrors Castle has no Deck rating yet.
The Assembly vs Mirrors Castle — FAQ
- Should I play The Assembly or Mirrors Castle first?
- If you want chronology, The Assembly (2016) came out before Mirrors Castle (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 The Assembly and Mirrors Castle similar?
- They overlap on Indie, 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.
- Does The Assembly have multiplayer like Mirrors Castle?
- No. Mirrors Castle supports multiplayer on Steam (Multi-player, Cross-Platform Multiplayer, Online Co-op), while The Assembly is listed as single-player only.
- Is Mirrors Castle free?
- Yes — Mirrors Castle is a free-to-play Steam title. The Assembly is paid (29.99 USD).
- Does The Assembly run on Steam Deck?
- Yes — The Assembly is rated Deck Verified by Valve. Mirrors Castle doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.