Choose Atomic Heart
Choose Atomic Heart if you want a RPG game with Adjustable Text Size, Color Alternatives, and Camera Comfort. On Steam, it's Steam Deck Verified, so handheld play works out of the box. 12,972 Steam reviews back the pick.
Atomic Heart vs Project Three
Atomic Heart and Project Three both land in Action, 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 share Action, Adventure on Steam. Atomic Heart (2023) is 2 years older than Project Three (2025). Atomic Heart scores higher on Steam reviews (78.1% positive) than Project Three (26.1% 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 Project Three
Choose Project Three if you want an Indie, Casual, and Early Access experience. On Steam, it's currently about 87% cheaper on the Steam Store. Project Three launched in 2025.
Both Atomic Heart and Project Three sit in Action and Adventure 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
 Atomic Heart |  Project Three | |
|---|---|---|
| Released | 2023 | 2025 |
| Genres | Action, Adventure, RPG | Action, Indie, Adventure, Casual, Early Access, Racing |
| Platforms | Windows | Windows |
| Steam Deck | Deck Verified | Unrated |
| Price | 59.99 USD | 7.99 USD |
| Steam reviews | 78.1% positive (12,972 reviews) | 26.1% positive (23 reviews) |
| Multiplayer | Single-player only | Single-player only |
| Developers | Mundfish | The Only Way Out |
Side by side
- Both share Action, Adventure on Steam.
- Atomic Heart (2023) is 2 years older than Project Three (2025).
- Atomic Heart scores higher on Steam reviews (78.1% positive) than Project Three (26.1% positive).
- Project Three is currently ~87% cheaper on Steam than Atomic Heart (7.99 USD vs. 59.99 USD).
- Atomic Heart is Deck Verified on Steam Deck; Project Three has no Deck rating yet.
Atomic Heart vs Project Three — FAQ
- Should I play Atomic Heart or Project Three first?
- If you want chronology, Atomic Heart (2023) came out before Project Three (2025). 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 Atomic Heart and Project Three similar?
- They overlap on Action, 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 Atomic Heart run on Steam Deck?
- Yes — Atomic Heart is rated Deck Verified by Valve. Project Three doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.