Choose Lonely Astronaut
Choose Lonely Astronaut if you want a Simulation and Casual experience. On Steam, it's free to play, so the barrier to trying it is zero. Lonely Astronaut launched in 2018.
Lonely Astronaut vs Graviton Core
Lonely Astronaut and Graviton Core 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. Lonely Astronaut (2018) is 8 years older than Graviton Core (2026). Lonely Astronaut is free; Graviton Core is paid (5.80 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 Graviton Core
Choose Graviton Core if you want the Steam Leaderboards, Custom Volume Controls, and Stereo Sound side of the pairing. On Steam, it's the newer release (2026) and ships with the modern feature baseline. Graviton Core launched in 2026.
Both Lonely Astronaut and Graviton Core sit in Action and 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
 Lonely Astronaut |  Graviton Core | |
|---|---|---|
| Released | 2018 | 2026 |
| Genres | Action, Indie, Simulation, Casual | Action, Indie |
| Platforms | Windows, macOS, Linux | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | Free to play | 5.80 USD |
| Steam reviews | 92% positive (25 reviews) | — |
| Multiplayer | Single-player only | Single-player only |
| Developers | Greyson Richey, Nicholas Lives | JPGames |
Side by side
- Both share Action, Indie on Steam.
- Lonely Astronaut (2018) is 8 years older than Graviton Core (2026).
- Lonely Astronaut is free; Graviton Core is paid (5.80 USD).
- Lonely Astronaut is Deck Playable on Steam Deck; Graviton Core has no Deck rating yet.
Lonely Astronaut vs Graviton Core — FAQ
- Should I play Lonely Astronaut or Graviton Core first?
- If you want chronology, Lonely Astronaut (2018) came out before Graviton Core (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 Lonely Astronaut and Graviton Core 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.
- Is Lonely Astronaut free?
- Yes — Lonely Astronaut is a free-to-play Steam title. Graviton Core is paid (5.80 USD).
- Does Lonely Astronaut run on Steam Deck?
- Yes — Lonely Astronaut is rated Deck Playable by Valve. Graviton Core doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.