If you haven't played ME3 through and don't want to spoil the ending, TURN BACK NOW. Each of these scenarios has varying degrees of spoilers in them. I know it is *technically* against site policy, but for this reason I am posting this blurb on it's own without an immediate chapter.
The ending of Mass Effect 3 blew me away, and not in a good way. It's terrible. It's not that it's bleak, or boring, or too dark. I don't know... it just sucks. It doesn't make any sense at all, is not conclusive, and doesn't tie in with the rest of the story. There are good analyses out there, go read one.
Anyway, I figured even my dumbest ideas are at least better than that piece of crap. Don't get me wrong, 99% of ME3 was amazing. Unfortunately, the last 1% is the really important part.
Some of these are better than others. I wrote them quickly and out of rage, so don't expect the world. These are hackjobs, not lovingly crafted alternate endings, but maybe someone will enjoy them.