What's better than shooting people? Running and shooting them at the same time! Welcome to the Club!
The Club is 3rd person action packed shooter focusing heavily on run and gun gameplay. I have never seen game that would focus on run and gun as much as this game in single player mode. Whole game is designed around combo system. If you kill a guy, you get x points (depends on where you hit him, and which type of enemy you kill, as well as distance from which kill is scored). If you kill another one before your combo ends, you get 2x more points, and then 3x. The higher combo, the faster "downtime" (time before combo ends). So yeah, if you don't like to kill fast and move a lot, this game is probably not for you.
Otherwise game is well optimized from performance point of view. However menus are very sad, they are designed for gamepads, and if you have one you should really use them in menus instead of mouse and keyboard. Also there's no way as far as I'm aware, to change FOV, which is not very high (I think it's around 60).
Another sad thing is, that they designed split screen, but removed it in PC version. There's online multiplayer, but not active anymore. But you can still play it if you get a couple friends in the game, it's a lot of fun in my option.
Game is using Games for Windows Live. Yes dat DRM. 98% of people play this game only for single player, and that's why I think you shouldn't worry about GFWL as you can:
a) create offline account and just play without MS account
b) install xlive which removes GFWL, and lets you enjoy the game without DRM
There's no coop, but there's gunplay. Gunplay is gamemode designed to be played against friends. You basicily select maps, and weapon you want to use in that level, and try to get as many points as possible. Then your friend plays, and his goal is to score more points than you. This mode can be played with up to 4 players, and it's fully compatible with X360 gamepads, so if you have 2 or more, you can each play with your own gamepad.