I've seen lots of videos of the i3 playing bf4 multiplayer with like 98-99% core usage, so if you ever think you'd want to play multiplayer at least get the i3. They got pretty good fps playing on ultra with msaa turned off with a gtx 660. They had windows 8.1 though, and I have windows 7. It was maddening seeing a lesser setup than mine get way better fps >_>
if for single player ONLY, the pentium would be fine, they're still the same cores, they're strong. But I imagine wouldn't fare well at all in multiplayer.
edit:here's a video I found of the pentium on multiplayer lol,
https://www.youtube.com/watch?v=9Er-wXiPyjE