One of the reasons I enjoy being a PC gamer is the ease of taking screenshots. Sometimes, many screenshots. It's a hotkey that calls to me with an allure I can't ignore.
So it came to pass that when I played through Mass Effect 3 with my Shepard, the Shepard I had played through Mass Effect and Mass Effect 2, I felt compelled to chronicle her adventure in pictures. In the end, the album made a still-frame diary telling the story of who my Shepard was, who she saved, who she sacrificed, and who she loved.
Although the opening sequence and first two missions are absent (I hadn't yet sorted out the best way easily to capture screengrabs) the folder of nearly 900 images I had when all was said and done represented the full story that I saw in my personal playthrough of Mass Effect 3, which in the end will be nearly identical to many other players' stories and yet also remains unique to me. (This also means that there are enormous spoilers throughout, for every major mission, some minor ones, and for the game's ending.)
Resident Kotaku video guru Chris Person has taken this series of stills and strung them together into one very cool-looking story.
Update: For those of you who haven't made it to the end but are curious about the music, the song is Winter from Antonio Vivaldi's The Four Seasons played by The United States Air Force Band (via Archive.org).