Platforms
On Xbox Series X and Series S
The console listing
The Xbox store sells Castlevania: Belmont's Curse for Xbox Series X|S and for Xbox on PC. The feature line is 4K Ultra HD, 60 frames per second or higher, and Play Anywhere, with cloud saves and Xbox achievements. Standard is $29.99 and Midnight is $39.99. The store date is 15 October 2026.
A file-size note of 7.48 GB appears in a GameRant sidebar and does not match Konami's 8 GB and 10 GB edition sizes. This page treats Konami's figures as the edition sizes and mentions the other number only as a disagreement, not as a replacement.
Not the Game Pass page
Cloud streaming needs Game Pass Essential, Premium, or Ultimate, and it still needs a purchase. That rule is explained on the Game Pass page. Buying the console version is this page. Cross-saves between Series X|S and Xbox on PC had a display bug that the 22 October patch says it fixed.
What I ran into
I split Game Pass off this URL after I watched a draft answer both 'should I buy it' and 'is it free' in one paragraph. They are different decisions. The buy decision is the one left here.
Questions
Is the Xbox version 4K?
The Xbox store lists 4K Ultra HD and 60fps or higher.
Do I need Game Pass to play on a console I own?
No. Game Pass matters for cloud streaming. A purchased console install does not require it.