I bought Half-Life 2's collector's edition and have that listed as a PC game, I also have Fallout: New Vegas Collector's Edition and that's listed in my PC section. Though I also added all the games to my Steam library.
I'm not exactly sure how to handle bundled Steam games. Like I bought Warhammer 40,000: Dawn of War II Gold Edition on steam, which included Chaos Rising. I added the bundle to the database and have it listed like that. Of course, both Dawn of War II and DoW2: Chaos Rising are both purchasable separately. Now, if games are only part of a bundle, then I suppose we could either list each bundle or list only the games. Steam confuses me sometimes, thanks to their multiple bundles and ways of buying games.