– Simple Series Vol. 14 The Block Buster
– Simple Series Vol. 15 The Pachinko
– Simple Series Vol. 18 The Bowling
– Simple Series Vol. 31 The Sound Novel
None of these are particularly notable and one of them has actually been released in North America by Agetec. However, this collection is something to keep an eye on. D3 Publisher developed some obscure titles like The Cameraman, a RayStorm/RayCrisis double pack, and The Mountain Climbing RPG (pictured).
Each downloadable Simple Series game is only 300 yen ($3.30), which is half the price of other downloadable PsOne games in Japan.