Call of Duty 4: Modern Warfare isn't just a game you download. It is a time machine. And for $15 (or less), that is the best bargain in gaming.
It has been over 15 years since a single sniper bullet changed the face of first-person shooters forever.
Do not download this expecting a bustling, modern lobby. Download it for the campaign. Download it for the history lesson. Download it to remember what it felt like when a video game had the guts to make you crawl under a dead tank while a helicopter scanned overhead.