Actually I'm comparing the MD versions. The MD Undeadline was done by PAL Soft and is a totally different game from the MSX and X68000 versions. The computer versions are both awesome in a masochistic kind of way, but have parts that require pure luck to survive. PAL Soft's changes for the MD version make it a much better game to actually play. They completely removed all the random crap, and the focus is on pure skill. It's a tough game for sure, but never cheap. It's a lot like R-Type imo, when you die, it's your fault.