i came across this fan made game "halo galaxy of combat" that will be coming out in spring 2012, this game is a MMOFPS game, i dont know much info yet about the story its gonna take,but it will be 100% free to play when it comes out, here is the trailer i seen on youtube, i hope it will be ok for me to post this video.
http://www.youtube.com/watch?v=CGXGqFIWEjI&lc=9V2miGUakUFj2sS4N2KbHqf07VJ93r3C4iYBpG6qU4Y&feature=inbox