Since 1.6 the amount of key changes/additions to the series's core gameplay has shaken up minimally. CS:GO took away ammo purchasing, added decoys, fire grenades, (and as it was updated) some new guns with their own quirks (R8 and such). This lack of messing with a proven formula, combined with the constant playerbase is proof to just how strong Counter Strike's game design is. Simply put, it's the best team e-sport ever designed. Imitators and other shooters try their best to swing at the king, but they miss every time. CS:GO applies modern F2P principles in a way that never infringes on the key gameplay, and that gameplay is sick. You're expected (and essentially required) to communicate with your team to succeed, which creates for some of the most memorable gaming moments I've had the pleasure to despise and enjoy. The maps are proven, so even though the key pool is around eight or so, they provide an endless amount of situations that make replaying them a different experience every time. You'll rage, you'll lose faith in humanity, or you'll grab a competent five-stack, and co-ordinate some sick plays and pull off some wild flick shots that make you feel like a legend. I could understand emotionally how some people could give this a low rating, but on the average day, CS:GO is a perfected multiplayer game.