Choose Starship Simulator
Choose Starship Simulator if you want a RPG and Free To Play game with Multi-player, Online Co-op, and Camera Comfort. On Steam, it's free to play, so the barrier to trying it is zero.
Starship Simulator vs PlanetMars3D: Spirit Mission
Starship Simulator and PlanetMars3D: Spirit Mission both land in Adventure, Simulation, 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 Adventure, Simulation, Casual on Steam. Starship Simulator is free; PlanetMars3D: Spirit Mission is paid (Price unknown). Starship Simulator has co-op; PlanetMars3D: Spirit Mission does not. 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 PlanetMars3D: Spirit Mission
Choose PlanetMars3D: Spirit Mission if you want an Indie game with Playable without Timed Input. On Steam, it's a focused single-player run rather than a multiplayer commitment. PlanetMars3D: Spirit Mission launched in 2026.
Both Starship Simulator and PlanetMars3D: Spirit Mission sit in Adventure, Simulation, 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
 Starship Simulator |  PlanetMars3D: Spirit Mission | |
|---|---|---|
| Released | — | 2026 |
| Genres | Adventure, Simulation, RPG, Free To Play, Casual | Indie, Adventure, Simulation, Casual |
| Platforms | Windows | Windows, macOS |
| Steam Deck | Unrated | Unrated |
| Price | Free to play | Price unknown |
| Steam reviews | — | — |
| Multiplayer | Multi-player, Online Co-op, Co-op | Single-player only |
| Developers | Fleetyard Studios | 4AI Limited |
Side by side
- Both share Adventure, Simulation, Casual on Steam.
- Starship Simulator is free; PlanetMars3D: Spirit Mission is paid (Price unknown).
- Starship Simulator has co-op; PlanetMars3D: Spirit Mission does not.
Starship Simulator vs PlanetMars3D: Spirit Mission — FAQ
- Are Starship Simulator and PlanetMars3D: Spirit Mission similar?
- They overlap on Adventure, Simulation, 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 PlanetMars3D: Spirit Mission have multiplayer like Starship Simulator?
- No. Starship Simulator supports multiplayer on Steam (Multi-player, Online Co-op, Co-op), while PlanetMars3D: Spirit Mission is listed as single-player only.
- Is Starship Simulator free?
- Yes — Starship Simulator is a free-to-play Steam title. PlanetMars3D: Spirit Mission is paid (Price unknown).