MySQL and phpMyAdmin? Sure it may take a bit to get setup exactly how you want it, but it's fully customizable and it can handle more than just games. :D
You're talking to a guy that couldn't code his way out of a Hello World program. in QBasic.
Also, I sorta tried doing this with MS Access. I figured out how to add stuff, but not how to customize the display to my tastes. I ended up using the Access thing exactly the same as my Google Docs worksheet, so I gave up on it.
GCstar, it does everything: http://www.gcstar.org
I remember trying it out months ago. I also remember hating the hell outta it because it had no way of removing all the fields I didn't want from its "Video Game Collection" template. I don't want a description, or cheat codes, or screenshots... all I wanted is a list with pictures, and some specific fields I could fill out.
I ended up tinkering with this again and sorta made a working collection. Unfortunately, I can't seem to be able to add the search plugins if I do that. Kind of a pain in the butt...