Choose Under A New Sun
Choose Under A New Sun if you want an Indie, Simulation, and Early Access game with Online Co-op, Custom Volume Controls, and Stereo Sound. On Steam, it has co-op, so you can bring a friend. Under A New Sun launched in 2023.
Under A New Sun vs I Thalassa
Under A New Sun and I Thalassa both land in Adventure 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 Adventure games on Steam. Under A New Sun has co-op; I Thalassa does not. Under A New Sun is Deck Playable on Steam Deck; I Thalassa 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 I Thalassa
Choose I Thalassa if it matches what drew you to this matchup.
Both Under A New Sun and I Thalassa sit in Adventure on Steam and both list Multi-player, 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
 Under A New Sun |  I Thalassa | |
|---|---|---|
| Released | 2023 | — |
| Genres | Indie, Adventure, Simulation, Early Access | Adventure |
| Platforms | Windows | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | 17.99 USD | Price unknown |
| Steam reviews | 76.9% positive (182 reviews) | — |
| Multiplayer | Multi-player, Online Co-op, Co-op | Multi-player |
| Developers | New Horizon Games | San Liuk |
Side by side
- Both are Adventure games on Steam.
- Under A New Sun has co-op; I Thalassa does not.
- Under A New Sun is Deck Playable on Steam Deck; I Thalassa has no Deck rating yet.
Under A New Sun vs I Thalassa — FAQ
- Are Under A New Sun and I Thalassa similar?
- They overlap on Adventure 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 Under A New Sun run on Steam Deck?
- Yes — Under A New Sun is rated Deck Playable by Valve. I Thalassa doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.