Choose Once Upon a Galaxy
Choose Once Upon a Galaxy if it matches what drew you to this matchup. Once Upon a Galaxy launched in 2025.
Once Upon a Galaxy vs Advent Arena
Once Upon a Galaxy and Advent Arena both land in Strategy, Indie, Free To Play 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 Strategy, Indie, Free To Play on Steam. Once Upon a Galaxy (2025) is 1 year older than Advent Arena (2026). Both are free to play. 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 Advent Arena
Choose Advent Arena if you want the Online Co-op and Co-op side of the pairing. On Steam, it has co-op, so you can bring a friend. Advent Arena launched in 2026.
Both Once Upon a Galaxy and Advent Arena sit in Strategy, Indie, and Free To Play 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
 Once Upon a Galaxy |  Advent Arena | |
|---|---|---|
| Released | 2025 | 2026 |
| Genres | Strategy, Indie, Free To Play, Casual | Strategy, Indie, Free To Play, Casual |
| Platforms | Windows, macOS | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | Free to play | Free to play |
| Steam reviews | 82.6% positive (553 reviews) | — |
| Multiplayer | Multi-player, Cross-Platform Multiplayer | Multi-player, Cross-Platform Multiplayer, Online Co-op |
| Developers | Million Dreams Games | Level 30 Wizard |
Side by side
- Both share Strategy, Indie, Free To Play on Steam.
- Once Upon a Galaxy (2025) is 1 year older than Advent Arena (2026).
- Both are free to play.
- Advent Arena has co-op; Once Upon a Galaxy does not.
- Once Upon a Galaxy is Deck Playable on Steam Deck; Advent Arena has no Deck rating yet.
Once Upon a Galaxy vs Advent Arena — FAQ
- Should I play Once Upon a Galaxy or Advent Arena first?
- If you want chronology, Once Upon a Galaxy (2025) came out before Advent Arena (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 Once Upon a Galaxy and Advent Arena similar?
- They overlap on Strategy, Indie, Free To Play 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 Once Upon a Galaxy run on Steam Deck?
- Yes — Once Upon a Galaxy is rated Deck Playable by Valve. Advent Arena doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.