Underground Gamer indexes a huge amount of classic games any they are not PC only. You can find games for Atari, Sega, Nintendo, Commodore, etc. You can check the complete list in categories screen shot. They also have Gaming books, Magazines, Guides and games related music.
The comunity is very active and helpful, speeds are ok, and the games selection is huge. Among the 9500 torrents there are some huge packs...as large as 396GB.
Invites are given every 10 days to PU+ using the following requirements:
If you like to gamble you can participate in their montly GB Lottery.
There is a featured torrents category and this are re-selected periodically
Only classic games can be uploaded to UG and that's what makes this site unique. By theis standards a game is classic if it was released in 2002 or earlier.
If you enjoy playing classic games UG is the tracker for you!