Choose Project Subtrahend
Choose Project Subtrahend if you want a Casual experience. On Steam, it's currently about 50% cheaper on the Steam Store. Project Subtrahend launched in 2023.
Project Subtrahend vs Interstate 35
Project Subtrahend and Interstate 35 both land in 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 are Indie games on Steam. Project Subtrahend (2023) is 1 year older than Interstate 35 (2024). Project Subtrahend is currently ~50% cheaper on Steam than Interstate 35 (3.99 USD vs. 7.99 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 Interstate 35
Choose Interstate 35 if it matches what drew you to this matchup. Interstate 35 launched in 2024.
Both Project Subtrahend and Interstate 35 sit in Indie on Steam, 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
 Project Subtrahend |  Interstate 35 | |
|---|---|---|
| Released | 2023 | 2024 |
| Genres | Indie, Casual | Indie |
| Platforms | Windows, macOS, Linux | Windows, Linux |
| Steam Deck | Unrated | Unrated |
| Price | 3.99 USD | 7.99 USD |
| Steam reviews | 2 reviews | 100% positive (34 reviews) |
| Multiplayer | Single-player only | Single-player only |
| Developers | LilyDynamite | Radiant Array |
Side by side
- Both are Indie games on Steam.
- Project Subtrahend (2023) is 1 year older than Interstate 35 (2024).
- Project Subtrahend is currently ~50% cheaper on Steam than Interstate 35 (3.99 USD vs. 7.99 USD).
Project Subtrahend vs Interstate 35 — FAQ
- Should I play Project Subtrahend or Interstate 35 first?
- If you want chronology, Project Subtrahend (2023) came out before Interstate 35 (2024). 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 Project Subtrahend and Interstate 35 similar?
- They overlap on 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.