Choose GeminiArms
Choose GeminiArms if you want the Multi-player, Steam Leaderboards, and Shared/Split Screen Co-op side of the pairing. On Steam, it has co-op, so you can bring a friend. GeminiArms launched in 2019.
GeminiArms vs SUCCESSOR OF THE KEY
GeminiArms and SUCCESSOR OF THE KEY both land in Action, 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 Action, Indie, Casual on Steam. GeminiArms (2019) is 1 year older than SUCCESSOR OF THE KEY (2020). SUCCESSOR OF THE KEY is currently ~67% cheaper on Steam than GeminiArms (4.99 USD vs. 14.99 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 SUCCESSOR OF THE KEY
Choose SUCCESSOR OF THE KEY if it's currently about 67% cheaper on the Steam Store. SUCCESSOR OF THE KEY launched in 2020.
Both GeminiArms and SUCCESSOR OF THE KEY sit in Action, Indie, and Casual 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
 GeminiArms |  SUCCESSOR OF THE KEY | |
|---|---|---|
| Released | 2019 | 2020 |
| Genres | Action, Indie, Casual | Action, Indie, Casual |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Unrated |
| Price | 14.99 USD | 4.99 USD |
| Steam reviews | 3 reviews | 1 reviews |
| Multiplayer | Multi-player, Shared/Split Screen Co-op, Co-op | Single-player only |
| Developers | TERARIN GAMES | AKIBA-Willow |
Side by side
- Both share Action, Indie, Casual on Steam.
- GeminiArms (2019) is 1 year older than SUCCESSOR OF THE KEY (2020).
- SUCCESSOR OF THE KEY is currently ~67% cheaper on Steam than GeminiArms (4.99 USD vs. 14.99 USD).
- GeminiArms has co-op; SUCCESSOR OF THE KEY does not.
GeminiArms vs SUCCESSOR OF THE KEY — FAQ
- Should I play GeminiArms or SUCCESSOR OF THE KEY first?
- If you want chronology, GeminiArms (2019) came out before SUCCESSOR OF THE KEY (2020). 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 GeminiArms and SUCCESSOR OF THE KEY similar?
- They overlap on Action, 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 SUCCESSOR OF THE KEY have multiplayer like GeminiArms?
- No. GeminiArms supports multiplayer on Steam (Multi-player, Shared/Split Screen Co-op, Co-op), while SUCCESSOR OF THE KEY is listed as single-player only.