Most of the covers here aren't ready to be used in actual game boxes, but a few people have been nice enough to post high-res versions to be used for that reason exactly. There haven't been all that many so far (killer7 and Katamari Damacy are the only ones I can think of off the top of my head) but hopefully we'll get some more. I'm about to update the OP with the box arts that are ready to be printed and used.
most of these were not made print-ready; i'm sure a lot of them were made on a whim. i'd suggest if you were really serious about printing some of these to request in this thread which one you want done and/or pm the artist who made it if they can do it. i'd ascertain that a lot of assets that were used were already low quality, but hopefully most will be able and willing to provide a print ready copy (given some time, of course).
Wow. Why can't real boxart look like these? Instead of just being a bunch of character renders sloppily thrown together.
How would I go about printing these out if I wanted to use them? I assume I'd need a special kind of paper and ink. Do you think I'd just be able to bring them up to Kinkos or something on a USB stick?
Anyway, a I made these a few weeks ago. I think they're pretty good considering how I have little to no artistic skill. I'd put the GAF Collection stuff on them, but I don't have GIMP on this computer and can't install anything.