Yume Nikki Soul Dream OST

[Efendija]

Are these Yume Nikki albums official releases or some fanmade gamerips (<-those aren't suitable for vgmdb)?

Looking highly suspicious atm.......

[CHz]

None of these three albums (Soul Dream / 魂夢, Houchou Shoujo Gensoukyoku, and Memories of Replica) are soundtracks for Yume Nikki, but rather Yume Nikki fangames by Atelier Izumi.

I poked around Atelier Izumi's old site and it doesn't look like the soundtracks were ever offered as downloads. That and the covers appearing to just be fan art lead me to believe you are correct.