Once again, the track I've picked for your belated Thursday song isn't Throwback per se, but it does have a bit of old school flavour -- old school death metal flavour, to be precise. But this tasty death metal flavour is actually brand new school, and international to boot.
Human Improvement Process might hail from Italy, but their brand of death metal would sound at home coming from just about anywhere that death metal gets done. Take "Tortured Hands of Reason", from the band's EP Enemies of the Sun, for an example. It's just got all the elements it needs to slay: riffs, grooves, blast beats, even a little leadwork. If this kind of thing is your bag, you will dig these guys, so check 'em out.