IGN
1UP
Gamespot
RFGeneration
VGRebirth
Other Service
Excel or Text File
I don't keep track of what I own
Open Game Lister, though it's apparently no longer available for download. Bummer.
Open Game Lister | Partial Game Collection
Games Completed in: 2008 | 2007 | 2006 | 2005 | 2004 | Unknown
Oklahoma DP Roll Call!
I use Access. I was using IGN but ceased to use it about 10 months ago. For PCEngine and/or Turbografx-16/Duo I use pcedaisakusen.net collection database.
It's a bit daunting to set up the first time if you've never played with mySQL databases or anything before, but if you've ever installed something like Wordpress on a webserver then you'll be just fine. Here's a copy of 0.6.4 if you want to mess with it.
You'll need to create a mySQL database on your server, enter the database name, username and password in the connection_details.php file, and then open up setup_ogl.php in your browser to go through a couple of mostly automated steps (and then creating a user account). When you're all done with that, delete the setup_ogl.php file and you're ready to start adding games and systems to the ol' list.
Sadly, the ability to edit data once it's been entered isn't available (unless you access the database by some other manner), so if you botch an entry (or want to add more information), you'll have to either delete it or get comfortable poking around with whatever else you feel like using (I like phpMyAdmin because it's what I have available!).
Really not as user friendly as the other database options and lacks a lot of the bells and whistles, but it suits my needs perfectly and it's a bummer that Aypok seems to have lost interest in continuing development.
Open Game Lister | Partial Game Collection
Games Completed in: 2008 | 2007 | 2006 | 2005 | 2004 | Unknown
Oklahoma DP Roll Call!
I use an app called CLZ games. It’s $15 a year and keeps track of all of my games value, should I want to get rid of some games that I feel I won’t be playing anytime soon.
Pricecharting
Backloggery.com, so that I can track whether or not my games have actually been played and / or beaten...since that's why I own them. Anything I'm not planning on playing I sell.
You are startled by a grim snarl. Before you, you see 1 Red dragon. Will your stalwart band choose to (F)ight or (R)un?
I take photos of my collections and keep them on my phone. Any time I'm at a store looking over games I might pull out my phone and check the alphabetical collections pics to make sure I'm not buying a double.