The fact you said "it's the same game that came out in 2008, just prettier" really shows the fact you have no idea what you're talking about let alone the difference between a remake, remaster, and reboot

Dead Space is a Remake, they took the original game and essentially rebuilt it from the ground up and completely overhauled most everything in it, it's not just a graphical update

A Remaster would be something like Okami HD where they basically just took the base game and updated the resolution