Choose Solarium
Choose Solarium if you want a Free To Play experience. On Steam, it's free to play, so the barrier to trying it is zero. Solarium launched in 2017.
Solarium vs Space Planet Explorer
Solarium and Space Planet Explorer both land in Adventure, Simulation 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 Adventure, Simulation on Steam. Solarium is free; Space Planet Explorer is paid (Price unknown). Solarium is Deck Playable on Steam Deck; Space Planet Explorer has no Deck rating yet. 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 Space Planet Explorer
Choose Space Planet Explorer if you want a Strategy and Indie experience.
Both Solarium and Space Planet Explorer sit in Adventure and Simulation 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
 Solarium |  Space Planet Explorer | |
|---|---|---|
| Released | 2017 | — |
| Genres | Adventure, Simulation, Free To Play | Strategy, Indie, Adventure, Simulation |
| Platforms | Windows | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | Free to play | Price unknown |
| Steam reviews | 72.2% positive (79 reviews) | — |
| Multiplayer | Single-player only | Single-player only |
| Developers | Sunfleck Software | ioStudios |
Side by side
- Both share Adventure, Simulation on Steam.
- Solarium is free; Space Planet Explorer is paid (Price unknown).
- Solarium is Deck Playable on Steam Deck; Space Planet Explorer has no Deck rating yet.
Solarium vs Space Planet Explorer — FAQ
- Are Solarium and Space Planet Explorer similar?
- They overlap on Adventure, Simulation 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 Solarium free?
- Yes — Solarium is a free-to-play Steam title. Space Planet Explorer is paid (Price unknown).
- Does Solarium run on Steam Deck?
- Yes — Solarium is rated Deck Playable by Valve. Space Planet Explorer doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.