ok, i've got a Playstation Games Guide from early 1999, which lists all games released in Germany until then, should be quite accurate, it lists all those games with USK, Dev and Pub, no SLES though, do you need that list? i could make an xls file of it and provide it for you, but as that's already quite a lot of work and a lot of info and i'm able to inform you about any new german releases i might even consider teaming up with you (i wouldn't do any work on rarity and prices though except commenting ones i disagree with as i don't collect PSX and don't know shit about rarity/price usually...)