Choose Sudoku Zenkai / 数独全卡
Choose Sudoku Zenkai / 数独全卡 if you want a Strategy game with Multi-player, Steam Leaderboards, and Online Co-op. On Steam, it has co-op, so you can bring a friend. Sudoku Zenkai / 数独全卡 launched in 2018.
Sudoku Zenkai / 数独全卡 vs One Line: Letters and Codes
Sudoku Zenkai / 数独全卡 and One Line: Letters and Codes both land in Indie, Casual 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, Casual on Steam. Sudoku Zenkai / 数独全卡 (2018) is 4 years older than One Line: Letters and Codes (2022). One Line: Letters and Codes scores higher on Steam reviews (92.9% positive) than Sudoku Zenkai / 数独全卡 (85.4% 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 One Line: Letters and Codes
Choose One Line: Letters and Codes if you want the Custom Volume Controls side of the pairing. On Steam, it's currently about 80% cheaper on the Steam Store. One Line: Letters and Codes launched in 2022.
Both Sudoku Zenkai / 数独全卡 and One Line: Letters and Codes sit in Indie and Casual on Steam and both list Playable without Timed Input and Mouse Only Option, 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
 Sudoku Zenkai / 数独全卡 |  One Line: Letters and Codes | |
|---|---|---|
| Released | 2018 | 2022 |
| Genres | Strategy, Indie, Casual | Indie, Casual |
| Platforms | Windows, macOS, Linux | Windows |
| Steam Deck | Unrated | Unrated |
| Price | 3.99 USD | 0.79 USD |
| Steam reviews | 85.4% positive (82 reviews) | 92.9% positive (28 reviews) |
| Multiplayer | Multi-player, Cross-Platform Multiplayer, Online Co-op | Single-player only |
| Developers | ImaginationOverflow | Climbing Goat Games |
Side by side
- Both share Indie, Casual on Steam.
- Sudoku Zenkai / 数独全卡 (2018) is 4 years older than One Line: Letters and Codes (2022).
- One Line: Letters and Codes scores higher on Steam reviews (92.9% positive) than Sudoku Zenkai / 数独全卡 (85.4% positive).
- One Line: Letters and Codes is currently ~80% cheaper on Steam than Sudoku Zenkai / 数独全卡 (0.79 USD vs. 3.99 USD).
- Sudoku Zenkai / 数独全卡 has co-op; One Line: Letters and Codes does not.
Sudoku Zenkai / 数独全卡 vs One Line: Letters and Codes — FAQ
- Should I play Sudoku Zenkai / 数独全卡 or One Line: Letters and Codes first?
- If you want chronology, Sudoku Zenkai / 数独全卡 (2018) came out before One Line: Letters and Codes (2022). 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 Sudoku Zenkai / 数独全卡 and One Line: Letters and Codes similar?
- They overlap on Indie, Casual 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 One Line: Letters and Codes have multiplayer like Sudoku Zenkai / 数独全卡?
- No. Sudoku Zenkai / 数独全卡 supports multiplayer on Steam (Multi-player, Cross-Platform Multiplayer, Online Co-op), while One Line: Letters and Codes is listed as single-player only.