Only online games are currently included, it's poor that they haven't sorted this yet.
Not all my games show up in Game Explorer.

4 months ago, staff said that it would take them a couple of weeks to finish importing the live games back into the explorer after a system update.
Source: Post by Kohai on the wall of one of my current opponents:
http://www.chess.com/members/view/albatros1
I'm trying to browse my games in the game explorer, but I notice only very old games are there. Is that because blitz games aren't included? I have been playing blitz instead of longer games for quite awhile now.