Choose 39 Days to Mars
Choose 39 Days to Mars if you want the Color Alternatives and Stereo Sound side of the pairing. On Steam, it's currently about 33% cheaper on the Steam Store. 39 Days to Mars launched in 2018.
39 Days to Mars vs Knights And Bikes
39 Days to Mars and Knights And Bikes 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. 39 Days to Mars (2018) is 1 year older than Knights And Bikes (2019). Knights And Bikes scores higher on Steam reviews (89.2% positive) than 39 Days to Mars (76.6% 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 Knights And Bikes
Choose Knights And Bikes if you want an Action game with Online Co-op. On Steam, it carries the stronger Steam consensus at 89.2% positive across 268 reviews.
Both 39 Days to Mars and Knights And Bikes sit in Indie and Adventure 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
 39 Days to Mars |  Knights And Bikes | |
|---|---|---|
| Released | 2018 | 2019 |
| Genres | Indie, Adventure | Action, Indie, Adventure |
| Platforms | Windows, macOS, Linux | Windows, macOS, Linux |
| Steam Deck | Deck Playable | Deck Verified |
| Price | 13.39 USD | 19.99 USD |
| Steam reviews | 76.6% positive (107 reviews) | 89.2% positive (268 reviews) |
| Multiplayer | Multi-player, Shared/Split Screen Co-op, Co-op | Multi-player, Online Co-op, Shared/Split Screen Co-op |
| Developers | It's Anecdotal | Foam Sword |
Side by side
- Both share Indie, Adventure on Steam.
- 39 Days to Mars (2018) is 1 year older than Knights And Bikes (2019).
- Knights And Bikes scores higher on Steam reviews (89.2% positive) than 39 Days to Mars (76.6% positive).
- 39 Days to Mars is currently ~33% cheaper on Steam than Knights And Bikes (13.39 USD vs. 19.99 USD).
- Both support cooperative play.
- Steam Deck: 39 Days to Mars is Deck Playable, Knights And Bikes is Deck Verified.
39 Days to Mars vs Knights And Bikes — FAQ
- Which is better, 39 Days to Mars or Knights And Bikes?
- On Steam reviews Knights And Bikes scores higher (89.2% positive) than 39 Days to Mars (76.6% positive). Both have enough reviews to trust the signal, so for players using reviews alone, Knights And Bikes is the safer pick. Genre fit still matters — check the side-by-side table for the categories each game lands in.
- Should I play 39 Days to Mars or Knights And Bikes first?
- If you want chronology, 39 Days to Mars (2018) came out before Knights And Bikes (2019). 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 39 Days to Mars and Knights And Bikes 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.
- Do both 39 Days to Mars and Knights And Bikes have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: 39 Days to Mars ships Shared/Split Screen Co-op, Co-op; Knights And Bikes ships Online Co-op, Shared/Split Screen Co-op.