Killer is a little 5-parter from November 2009, written by Arlath's Star over on ff.net.
Summary: The Hub is in chaos, Torchwood is breaking down and the Team are trying to kill each other. And it’s all thanks to Jack’s new ‘team-building’ game… This is set just after ‘Adrift’, though that doesn’t impact much on the story.
Well, that sounds intriguing! Now I just need to find the time to read it =D
Read it here.
And that's all for this week! Happy reading, everybody!