Namco Bandai released a bunch of games as PsOne Classics in Japan. You can grab Cyber Sled, Smash Court, Xevious 3D/G+, Mr. Driller G, and Pac-Man World 20th Anniversary from Japan’s PlayStation Store. Each game costs 600 yen ($6).
Xevious 3D/G+ has a 3D remake of Xevious that feels kind of like Star Fox plus ports of Xevious, Super Xevious, and the Xevious Arrangement (a rearranged version of the arcade game). Might be worth checking out unless you’re a Mr. Driller addict like myself.