i believe it is Makito Nomiya
it doesn't explicitly state that he is the composer in the booklet but it does say he's the sound director and the track 30 remixer. but as i listen to it, it clearly sounds like it must be him.
makito nomiya has a really full, deep guitar sound with a lot of emphasis on the lower frequencies (i assume this is it cut through other sounds in the arcades at attract people to the machine). and he uses a lot of darker synths and chord progressions that sound alien-y sometimes. he likes reverb a lot.
and it sounds like his house of the dead 4 stuff, which is awesome. really in-your-face type stuff. he also worked with howard drossin on alienfront online, which was produced by the same team as house of the dead (then sega-wow). so i guess i know who made 2spicy now (i kind of always assumed it was ex sega wow by the art style)