Extracting .RDI .RDB files.

[yham]

I searched for these file formats but didn't get anything, so I need help.
This format is used in some KONAMI games.
The RDI that contains the RDB index seems to be compressed or encrypted.
Is it compressed because the first 8 bytes were the same...?

Samples：
https://mega.nz/file/xs0w1ZqZ#uMVALBtVezK1qflw0fMdi5s67zMkVvxdMu7_q_9yDjw

[aluigi]

I guess they are obfuscated in some way because, as you noticed, many bytes are the same in the two RDI samples.
No idea about what may be the algorithm.

[Ekey]

And of course no information about the app name

[yham]

I guess they are obfuscated in some way because, as you noticed, many bytes are the same in the two RDI samples.
No idea about what may be the algorithm.

And of course no information about the app name

Thanks for the reply.
Is there a solution for this situation?
Should I give up on these encrypted files?

[aluigi]

At least tell us the name of these games, in case someone would like to check them.

[yham]

At least tell us the name of these games, in case someone would like to check them.

Sorry I'm late. These are the titles.
Jikkyou Powerful Pro Yakyuu
Power Pro Kun Pocket R

Many other KONAMI titles use these formats. Momotaro Dentetsu, Pro Yakyu Spirits etc.