Blodia is a nice little puzzle game for the PC-Engine, with a similar concept as the more well known Pipe Dream. It is actually based on an older more or less completely unknown homecomputer game "Diablo" however. I found Blodia to be too difficult and stressful from the very beginning to be actually fun. But I guess when you have bought this game for much money back in the day and put some effort in it to dig into the mechanics and tricks, it could provide many hours of puzzle fun.