It's a pretty awesome Horror/RPG game in which a group of 11 people delve inside a pyramid in search of treasure, only to have to survive all the traps, undead and such inside.
The characters are pretty likable and interesting, and most of them have changeable fates too, meaning whether they live or die depends on whether you successfully save them (it changes things enough that I really recommend playing through this game twice, once in which you save everyone, and another where you let everyone die).
This was made on the PC-98 RPG Maker, so the whole game's got classic PC-98 aesthetics; the art and music is really nice, too. The English version comes packed with an already set up emulator though, so it's easy to play even on modern computers.
English version download/info here:
http://www.memoriesoffear.com/games_peretemherufortheprisoners/index.html