Choose ULTRAKILL
Choose ULTRAKILL if you want an Early Access experience. On Steam, it's Steam Deck Verified, so handheld play works out of the box. 141,047 Steam reviews back the pick.
ULTRAKILL vs Diatomic
ULTRAKILL and Diatomic both land in Action, Indie 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, Indie on Steam. ULTRAKILL (2020) is 4 years older than Diatomic (2024). ULTRAKILL scores higher on Steam reviews (97.7% positive) than Diatomic (74.7% 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 Diatomic
Choose Diatomic if it's currently about 60% cheaper on the Steam Store. Diatomic launched in 2024.
Both ULTRAKILL and Diatomic sit in Action and Indie 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
 ULTRAKILL |  Diatomic | |
|---|---|---|
| Released | 2020 | 2024 |
| Genres | Action, Indie, Early Access | Action, Indie |
| Platforms | Windows | Windows |
| Steam Deck | Deck Verified | Deck Playable |
| Price | 24.99 USD | 9.99 USD |
| Steam reviews | 97.7% positive (141,047 reviews) | 74.7% positive (83 reviews) |
| Multiplayer | Single-player only | Single-player only |
| Developers | Arsi "Hakita" Patala | Diatomic Studios |
Side by side
- Both share Action, Indie on Steam.
- ULTRAKILL (2020) is 4 years older than Diatomic (2024).
- ULTRAKILL scores higher on Steam reviews (97.7% positive) than Diatomic (74.7% positive).
- Diatomic is currently ~60% cheaper on Steam than ULTRAKILL (9.99 USD vs. 24.99 USD).
- Steam Deck: ULTRAKILL is Deck Verified, Diatomic is Deck Playable.
ULTRAKILL vs Diatomic — FAQ
- Should I play ULTRAKILL or Diatomic first?
- If you want chronology, ULTRAKILL (2020) came out before Diatomic (2024). 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 ULTRAKILL and Diatomic similar?
- They overlap on Action, Indie 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.