Snickerd00dle described it initially as:
So that's the basic gist. Your own subjective definition of "Summer" (May-August, June-September, etc.) is fine...just mark an end date and shoot for it!what I thought I would do is pick ten games that I own and have never beat, that are regarded as classics by most people and are also games that I really wish I had played through, games everyone talks about that I never ended up finishing, and beat all ten of them by the end of the summer.
So what game are you ashamed to admit you've never beat? What titles have been sitting on your shelf for a long time that you know you should play? Put them on your list of 10! The goal is to give all of your picks - each of which should be regarded as at least a minor classic - the 'ol college try. You may find that you do indeed hate that "classic" with a passion, but at least now you'll have experience to back up that claim! The challenge gets even more enjoyable when multiple people play the same game, so consider adding to/modifying your list before you actually get started.
Here's my own tentative list, which may change as I see people add things to their own. I plan to get started in about a week.
1. Capcom vs SNK 2 EO
2. Super Metroid
3. Diablo II (played about 1/4)
4. Steel Battalion
5. Star Fox (played about 3/4)
6. Time Crisis (played about 2/3)
7. Sly Cooper (played about 1/4)
8. Panzer Dragoon Orta
9. Final Fantasy IV
10. Road and Track Presents: The Need for Speed (can't be "beaten" but I put enough time into to call it "done")
The games I have knocked off in previous summer challenges:

