Let's Play PSX: Tecmo's Deception - Invitation to Darkness
You can even hear that this is the same composer from the Monster Rancher series. Tecmo's Deception is the first entry in the Deception series, and apparently revolves around setting up traps to kill would be adventurer's and steal their souls in order to raise Satan to destroy the world. You're not a very nice character, but by the end of the game, you realize the error of your ways. This is an early PSX release, and has the INSANE save size of NINE blocks. Keep in mind a Memory Card in those days only held 15 blocks. So a single save for this game was more than half your memory card. I hope you didn't want to keep a backup save, or else you'd have to have an entire second memory card. Even RPGs like the AAA title Final Fantasy VII only took a single block. The sheer sloppiness of a 9 block save file can't be overly emphasized as pure insanity.
It's literally amazing that the developers sold a game with this requirement! I don't think I could have written such a wasteful save format if I tried. Mind you that a memory card in those days cost the equivalent of $38 dollars in today's money, so you weren't exactly about to run out and by a second one just for this game. I hope you were able to beat it through in a couple of days so you could clear space for better games.
Oh yeah, the game. It seems ok. Apparently the later part of the game is mostly like a tower-defense style game where you set traps and run around setting them off to kill enemies. The plot is pretty basic, nothing to really get invested in.