TAKE TO THE STREETS FOR INTENSE CLOSE QUARTERS COMBAT, where a team's survival depends upon securing crucial strongholds and destroying enemy supply. The follow-up game to the award-winning Source mod, INSURGENCY is highly competitive and unforgivingly lethal, striking a balance between one-life gameplay and prolonged action.
Insurgency is the best tactical shooter TO DATE. The gameplay is perfect. Everything feels like it should. Its intense, well paced and is just loads of fun. Its well balanced, nothing feels unfair or cheap, if you die, it was probably your fault. The gunplay is realistic and just feels right. The maps are well layed out and don't give one team an advantage over the other. Your loadout is fully customizable; from what type of vest you want, all the way down to what gun you want and what attachments you want for that specific gun. Yes, you get to customize your weapon attachments.
The game has a good amount of content to offer. There are plenty of gamemodes (including co-op if you don't like PvP,) plenty of maps, and plenty of classes/loadouts. They're still adding stuff, by the way.
The sound design is FLAWLESS. I mean like wow, this is Battlefield-esque sound design. The graphics, while looking pretty outdated at times, are some of the best I've seen on the Source engine.
TL;DR: Insurgency puts Counter-Strike: Global Offensive to shame.