[HomeComputerGames]

I just had a great example of this. I am getting a ton of traffic all of a sudden from Google for this very reason. I posted an image gallery on my blog of famous video game girls. Just under 50 images I believe. Now almost any search you do with "games" and "girls" in the search returns at least one of these images on Google on page 1 of the image search. Often they are also in the top results on the web search page and not just on the image search page.

I did name each image video-game-girls1.jpg, video-game-girls2.jpg, etc... and used the same text without the file extension for the alt tags.