Remaster can mean a lot of things albeit usually its just a lazy HD make over of some of the graphics. In some cases it has included more polish/updating of mechanics (while still retaining the spirit of the original) and/or implementing things as they were originally intended before being cut back for budget or time reasons. In other cases liberties are taken and movement feel or other things that made the original special are lost.
Chances are though its just a dirty copy n paste job into a newer engine with stuff missing, shortcuts taken, etc. might only be the SP without other features as well.
Call of Duty: Modern Warfare Remastered boasts vibrant current generation visuals, with fully improved texture resolution and detail, high-dynamic range lighting, lit and shadowing VFX particles, revamped animation and audio, stunning sound, and much more. Fans will relive the full, iconic campaign as they’re transported around the globe with Capt. Price, Gaz and Soap across all the missions from the original game, including “All Ghillied Up,” “Charlie Don’t Surf,” and “Crew Expendable.” Players will also experience the online multiplayer mode that redefined Call of Duty by introducing killstreaks, XP, Prestige and more, and battle head-to-head in 10 fan-favorite maps from the original multiplayer mode, including classics such as “Crash,” “Backlot” and “Crossfire.”
The amount of fun I had on cod4 back in the day was unbelievable. Such good times.. I am looking forward to replaying the campaign and multiplayer once more.