This Castlevania DOOM mod is called "Simon's Destiny" and man...this is cool. It's not a true or dumped Castlevania project (big ol' props to Batandy for taking the time to make the mod), but it looks awesome and really makes you think about the possibilities. Much like RE7 (and yeah, I know the debate over whether or not 7 is a "true" Resident Evil will forever rage), first person seems like a bad idea until it works really well; say what you want about RE7, it is effective and does exactly what it sets out to do. I wouldn't mind seeing a Castlevania offshoot like this just for the hell of it. After all, no one flipped out when Castlevania went 3-D, but now they have the 3D versions, and the 2-D is still alive and kicking. Take a look at the "trailer" and just imagine this on a badass engine.