1. Battlefield (2-4) even though 4 is a mess right now!

2. Day Z

3. Rust

4.Grand Theft Auto Online (5)

5.Sniper Elite V2

6. Max Payne 3 (when it first came out it was loads of fun, not many people play on the free aim servers anymore)

7.Mass Effect 3

8.Uncharted 3

9. Rainbow Six Vegas 2 ( still one of my favorite online shooters to this day)

10.Call Of Duty's (any of them, while not my favorite to play frequently, i do play from time to time. BF is just so much better!)