The first-person shooter genre has never been hotter. It's what has dominated the gaming market over the past few years. Developers see the demand and look to cash in with their own take on these action-packed, intense shooters. Very few have been able to replicate the success of the Call of Duty franchise, though. \n \nThere have been many installments over the last decade, but one of the best in terms of sales is the most recent Call of Duty: Modern Warfare. This game -- developed by Infinity Ward -- has climbed the charts and is now the best-selling game in the series for this generation of consoles. These sales figures were noted by the publisher, Activision. So far, this game has brought in over $600 million worldwide. \n \nhttps:\/\/www.youtube.com\/watch?v=_6rIHrPNmWg \n \nThat's quite an amazing feat for this game and a testament to a lot of things, really. For starters, online multiplayer has never been better. There are just so many different modes you can fall in love with. \n \nGamers have loved what Infinity Ward has done with online multiplayer -- in fact -- that many are skipping the campaign and playing online first. That's when you know a Call of Duty game is doing well and exceeding expectations, even for the die-hard fans of this beloved first-person shooter series. \n \nThere are a lot of new modes in this latest installment, but Infinity Ward didn't stray away from its successful formula either. The balance of old and new elements keeps this game pretty balanced. You're sure to find something you like, whether it's the gripping story in the campaign or the online multiplayer variety. \n \nCustomizing your weapons has never been better as well. There are so many attachments you can equip to your favorite shooter, including infrared laser sights, extended clips, and plenty of cosmetic options to go around. \n \nThe fact that Activision didn't push a pay to win scheme also helped Call of Duty: Modern Warfare soar above its predecessors. Instead of buying guns to get an advantage, you can simply go through and earn them. It feels so satisfying leveling up and gaining access to a weapon you've wanted to try out from the jump. \n \nIn a space that has been saturated with copy-cats and unrealized potential, Call of Duty: Modern Warfare stands out. If you haven't had the chance to experience its well-rounded performance, now may be the perfect time. It's only getting better thanks to updates and map additions.