Choose Microsoft Allegiance
Choose Microsoft Allegiance if you want a Free To Play game with Steam Leaderboards. On Steam, it's free to play, so the barrier to trying it is zero. Microsoft Allegiance launched in 2017.
Microsoft Allegiance vs Space Interface
Microsoft Allegiance and Space Interface both land in Action, Strategy, 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 Action, Strategy, Simulation on Steam. Microsoft Allegiance is free; Space Interface is paid (Price unknown). Space Interface has co-op; Microsoft Allegiance 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 Space Interface
Choose Space Interface if you want an Indie and Massively Multiplayer game with Online Co-op and Co-op. On Steam, it has co-op, so you can bring a friend.
Both Microsoft Allegiance and Space Interface sit in Action, Strategy, and Simulation on Steam and both list Multi-player, Online PvP, and PvP, 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
 Microsoft Allegiance |  Space Interface | |
|---|---|---|
| Released | 2017 | — |
| Genres | Action, Strategy, Simulation, Free To Play | Action, Strategy, Indie, Simulation, Massively Multiplayer |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Unrated |
| Price | Free to play | Price unknown |
| Steam reviews | 83.7% positive (153 reviews) | — |
| Multiplayer | Multi-player | Multi-player, Online Co-op, Co-op |
| Developers | Microsoft Game Studios | Hbit LLC |
Side by side
- Both share Action, Strategy, Simulation on Steam.
- Microsoft Allegiance is free; Space Interface is paid (Price unknown).
- Space Interface has co-op; Microsoft Allegiance does not.
Microsoft Allegiance vs Space Interface — FAQ
- Are Microsoft Allegiance and Space Interface similar?
- They overlap on Action, Strategy, 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 Microsoft Allegiance free?
- Yes — Microsoft Allegiance is a free-to-play Steam title. Space Interface is paid (Price unknown).