I think I've come across only one tolerable Mass Effect SI fic, but even that one wasn't particularly good, because holy hell, the author/SI fetishized female Batarians to a disturbing level. @VanRopen, what was its name again? Anyway, here's something fantastic instead: Sudden Terminus As the summary itself says, this is the third and final part of the Sudden series, which we already have in the library, but I figured it was worth bringing up here, since the topic livened up a bit lately. Anyway, it's one of the best crossover fics in general that I've ever come across, which actually combines two settings in an unexpected and exceptional way. It's a fusion of Starcraft and Mass Effect, to put it simply, but I'm not sure I could do justice to the setting, so I'll just leave you to read the fics if you haven't done so already. Here's links for the first two: Sudden Contact Sudden Supremacy Spoiler The UED is here. Magnificent and relentless, they march forward in defiance of the watching darkness. On the edges, the only person with both the knowledge and means to stop what's coming remains wracked with doubt, at war with her nature. Jim Raynor, meanwhile, struggles onward in a galaxy that has outgrown him.