Hawken is sort of like the Call of Duty to Mechwarrior Online's Battlefield, but don't let that put you off.
I've been in the Alpha for a while too, we should play sometime. Someone on reddit a while ago posted that you could use the code "AlphaDog" and get access although I haven't personally tried it.
BF3: C2: [K22S] Kinetic Influence - Senior Operative C3: [PI3d] PRIDe - Lieutenant C4: [G1S] Gladius - Sergeant C5: [KYT] Kitten Adventure Rainbow Time - Private 1st Class C6: [SIP] International Monetary Fund - Private BF4 C1: [AD] Allied Forces - Private
I played two matches and went back to Mechwarrior. Too much FPS not enough feeling like a walking BAMF Mech for me. Although I guess I could see the appeal to the game for other people. Just not my cup of tea when it comes to playing a Mech game.
After only playing MWO, I feel like Hawken may be a better fit for my play style. I still waiting for an invite though. The "alphadog" code didn't work.