Need FPS recommendations

[budgy]

I'm pretty new at gaming; the last game I played was Left 4 Dead 2 (which I am still playing) and DOOM 3. I just upgraded:

AMD Phenom II X4 965 to a AMD FX-8520
G.Skills 8 GB DDR3 1333 MHz to ADATA 8 GB DDR3 1866 MHz
Nvidia GT 730 to 750Ti

I'm into FPS like Left 4 Dead 2 where you can play as a single player with multiple missions. Secondary, I love playing cooperative missions with other players. For some reason I find deathmatch very boring.

I was wondering if there are some FPS games that will satisfy my needs. Thanks in advance.

 

[Sylvvester]

Try Killing Floor.

 

[Vynavill]

Killing Floor sounds like the perfect thing for you, I agree.

 

[chimera201]

Borderlands 2