These 2 are prob the hardest ones to get. I need the Relentless and Pyshco skill kill. Anybody thats willing to get those send me a PM and ill give u my gamertag.

Getting them yourself is so much more rewarding though. I actually got Psycho without even trying- threw some C4 into a crash site on accident, thought I might as well detonate it and there happened to be 4 people there. I turned and killed another guy and got it

yea i've gotten triple kill alot but always run out of ammo to get the 4th. As far as the pyscho im having more trouble with that one.

Use some explosives, that'll finish of the last two