This was purely console gaming, and I guess that aside from Tetris, they didn't consider any ports of computer games (and you could argue that the most popular version of Tetris was the Gameboy version). They also didn't consider any game within the past year or so of the creation of the list. Looking at the date, it is older than I thought it was. It was printed in Jan 2002, so they considered all games up until the start of 2001. Basically every system before the GC/PS2/XBox era.

*edit*
Electronic Gaming Monthly is primarily a console gaming magazine, with very little on PC gaming. I consider it to be the best in its field. I hardly buy or play games anymore, but I still subscribe to keep up with the industry.