Another favorite Halloween costume of mine was also a video game character (a more obscure one): Betty Newbie, from The Sims.
I wish I had better photos!
I tried to find clothes pretty close to the default outfit she wore in the game. Thank you, thrift shops, for your selection of hideous bedazzeled purple stretch tops with shoulder pads.
I made a green diamond and wired it on top of a headband. It was the only drawback to the costume, I kept forgetting about the thing above my head and knocked into a lot of door frames. At least everyone knew I was content and healthy all the time!