Choose Rover Builder
Choose Rover Builder if you want a Strategy and Indie experience. On Steam, it's currently about 50% cheaper on the Steam Store. Rover Builder launched in 2022.
Rover Builder vs Main Assembly
Rover Builder and Main Assembly both land in 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 are Simulation games on Steam. Main Assembly (2021) is 1 year older than Rover Builder (2022). Main Assembly scores higher on Steam reviews (84.2% positive) than Rover Builder (65.5% 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 Main Assembly
Choose Main Assembly if you want the Multi-player, Online PvP, and Online Co-op side of the pairing. On Steam, it has co-op, so you can bring a friend. Main Assembly launched in 2021.
Both Rover Builder and Main Assembly sit in 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
 Rover Builder |  Main Assembly | |
|---|---|---|
| Released | 2022 | 2021 |
| Genres | Strategy, Indie, Simulation | Simulation |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Deck Playable |
| Price | 9.99 USD | 19.99 USD |
| Steam reviews | 65.5% positive (55 reviews) | 84.2% positive (745 reviews) |
| Multiplayer | Single-player only | Multi-player, Online Co-op, Co-op |
| Developers | Hatfuls Games | Bad Yolk Games |
Side by side
- Both are Simulation games on Steam.
- Main Assembly (2021) is 1 year older than Rover Builder (2022).
- Main Assembly scores higher on Steam reviews (84.2% positive) than Rover Builder (65.5% positive).
- Rover Builder is currently ~50% cheaper on Steam than Main Assembly (9.99 USD vs. 19.99 USD).
- Main Assembly has co-op; Rover Builder does not.
- Main Assembly is Deck Playable on Steam Deck; Rover Builder has no Deck rating yet.
Rover Builder vs Main Assembly — FAQ
- Should I play Rover Builder or Main Assembly first?
- If you want chronology, Main Assembly (2021) came out before Rover Builder (2022). 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 Rover Builder and Main Assembly similar?
- They overlap on 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.
- Does Rover Builder have multiplayer like Main Assembly?
- No. Main Assembly supports multiplayer on Steam (Multi-player, Online Co-op, Co-op), while Rover Builder is listed as single-player only.