Choose Calcium Contract
Choose Calcium Contract if it's Steam Deck Verified, so handheld play works out of the box. Calcium Contract launched in 2023.
Calcium Contract vs Sydless
Calcium Contract and Sydless both land in Action, Indie 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 on Steam. Calcium Contract (2023) is 3 years older than Sydless (2026). Sydless scores higher on Steam reviews (100% positive) than Calcium Contract (92.7% 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 Sydless
Choose Sydless if it's the newer release (2026) and ships with the modern feature baseline. Sydless launched in 2026.
Both Calcium Contract and Sydless sit in Action and Indie on Steam and both list Steam Leaderboards, 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
 Calcium Contract |  Sydless | |
|---|---|---|
| Released | 2023 | 2026 |
| Genres | Action, Indie | Action, Indie |
| Platforms | Windows | Windows |
| Steam Deck | Deck Verified | Unrated |
| Price | 9.99 USD | 9.89 USD |
| Steam reviews | 92.7% positive (110 reviews) | 100% positive (14 reviews) |
| Multiplayer | Single-player only | Single-player only |
| Developers | Igor Aleksandrowicz | Opia Games |
Side by side
- Both share Action, Indie on Steam.
- Calcium Contract (2023) is 3 years older than Sydless (2026).
- Sydless scores higher on Steam reviews (100% positive) than Calcium Contract (92.7% positive).
- Sydless is currently ~1% cheaper on Steam than Calcium Contract (9.89 USD vs. 9.99 USD).
- Calcium Contract is Deck Verified on Steam Deck; Sydless has no Deck rating yet.
Calcium Contract vs Sydless — FAQ
- Should I play Calcium Contract or Sydless first?
- If you want chronology, Calcium Contract (2023) came out before Sydless (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 Calcium Contract and Sydless similar?
- They overlap on Action, Indie 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 Calcium Contract run on Steam Deck?
- Yes — Calcium Contract is rated Deck Verified by Valve. Sydless doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.