JS's Steam Computer Games (580 *Or 884 Games) *See list
http://steamcommunity.com/id/JMSNorthern/games/?tab=all&sort=name
*Total number of Steam games is either 580 or 884.
On my Steam profile it lists 884 as the number of games owned while clicking on that figure displays a list of my actual Steam games totaling only 580 items.
I believe this discrepancy is probably caused by Steam including free-to-play Steam games in the higher figure to inflate the appearance of how many games you have available, whether you have these free-to-play games installed or not (though I do happen to have many of them installed).
In any case, I list both the low and high figures here since the true total of games owned is up to interpretation, especially considering I have installed and do play many of the free-to-play Steam games.
Figures accurate as of Mar. 3rd, 2013.