It looks like the site that has it offers cracks and such.
GTA III also has an entry for Mac Content, but none of the other GTA games seem too. It is a bit crummy that it seems the content is there but they aren't offering it at the moment for what ever reason.
Found the old entry to FFVII and FFVIII mentioned before, they say they would be 1450MB and 2040MB respectively.
There are Entries to Dungeon Siege 1 and 2, and right after them Final Fantasy XIV. In fact, there is a valid EULA for Dungeon Siege 1 up:
http://store.steampowered.com/eula/eula_39190
Notice how it says Square Enix though out, instead of Gas Powered Games too. No dates tied to it though.
Dungeon Siege 2 EULA:
http://store.steampowered.com/eula/eula_39200
There is an Entry for Pacman. One for Empire Earth II and III (But I am sure only I care about that)
Sega Genesis pack 4 contain some pretty good games IMO. Alien Solder, Gunstar Heroes, Landstalker, Light Crusader, Shining Force 1, Shining Force 2, Shining in the Darkness, Streets of Rage, Streets of Rage 2, and Wonder Boy 3. There are entires for other games too, like Toe Jam and Earl 1 and 2, Sonic 2, Sonic 3 and Knuckles (But no Sonic 3 or Sonic and Knuckles), my guess is they will be sold for $5 each.
Actually, there are two SEGA Genesis Classics Pack 4 entires. "SEGA Genesis Classics Pack 4" and "Sega Genesis Classics 4 Pack", the second one has Sonic 2, 3, Toe jam, ect with it, but the first has some purchasing restrictions tied to it.
There is a Listing to a Digital Version of PC Gamer.
Thats about it.