It's an awesome game. The multiplayer is a massive step up from the single player campaign. The single player campaign is more realistic in the tactics than any other game I've player. Marines stack at entrances, breaches are realistic, and you'll spend a lot of time in the prone. But multiplayer can be brutal, I just started multiplayer up, and it's pretty much two maybe three shots will kill you, and most more experienced players start out with better optics that meke them more accurate.