Choose CODEX MORTIS
Choose CODEX MORTIS if you want an Early Access experience. On Steam, it's currently about 50% cheaper on the Steam Store. CODEX MORTIS launched in 2026.
CODEX MORTIS vs Sundered Soul: Chains of the Undying
CODEX MORTIS and Sundered Soul: Chains of the Undying both land in Action, Indie, 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, Indie, RPG on Steam. Sundered Soul: Chains of the Undying (2025) is 1 year older than CODEX MORTIS (2026). Sundered Soul: Chains of the Undying scores higher on Steam reviews (100% positive) than CODEX MORTIS (71.4% positive). 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 Sundered Soul: Chains of the Undying
Choose Sundered Soul: Chains of the Undying if you want the Steam Leaderboards, Online Co-op, and Camera Comfort side of the pairing. Sundered Soul: Chains of the Undying launched in 2025.
Both CODEX MORTIS and Sundered Soul: Chains of the Undying sit in Action, Indie, and RPG on Steam and both list Multi-player, Shared/Split Screen, and Shared/Split Screen 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
 CODEX MORTIS |  Sundered Soul: Chains of the Undying | |
|---|---|---|
| Released | 2026 | 2025 |
| Genres | Action, Indie, RPG, Early Access | Action, Indie, RPG |
| Platforms | Windows, Linux | Windows |
| Steam Deck | Deck Verified | Unrated |
| Price | 3.99 USD | 7.99 USD |
| Steam reviews | 71.4% positive (28 reviews) | 100% positive (16 reviews) |
| Multiplayer | Multi-player, Shared/Split Screen Co-op, Co-op | Multi-player, Online Co-op, Shared/Split Screen Co-op |
| Developers | GROLAF | Aeoln Studios |
Side by side
- Both share Action, Indie, RPG on Steam.
- Sundered Soul: Chains of the Undying (2025) is 1 year older than CODEX MORTIS (2026).
- Sundered Soul: Chains of the Undying scores higher on Steam reviews (100% positive) than CODEX MORTIS (71.4% positive).
- CODEX MORTIS is currently ~50% cheaper on Steam than Sundered Soul: Chains of the Undying (3.99 USD vs. 7.99 USD).
- Both support cooperative play.
- CODEX MORTIS is Deck Verified on Steam Deck; Sundered Soul: Chains of the Undying has no Deck rating yet.
CODEX MORTIS vs Sundered Soul: Chains of the Undying — FAQ
- Should I play CODEX MORTIS or Sundered Soul: Chains of the Undying first?
- If you want chronology, Sundered Soul: Chains of the Undying (2025) came out before CODEX MORTIS (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 CODEX MORTIS and Sundered Soul: Chains of the Undying similar?
- They overlap on Action, Indie, 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.
- Do both CODEX MORTIS and Sundered Soul: Chains of the Undying have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: CODEX MORTIS ships Shared/Split Screen Co-op, Co-op; Sundered Soul: Chains of the Undying ships Online Co-op, Shared/Split Screen Co-op.
- Does CODEX MORTIS run on Steam Deck?
- Yes — CODEX MORTIS is rated Deck Verified by Valve. Sundered Soul: Chains of the Undying doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.