EverQuest and EverQuest II collections, as well as Vanguard: Saga of Heroes and Pirates of the Burning Sea. To kick off this monumental event, Pirates of the Burning Sea, Vanguard: Saga of Heroes, EQ Secrets of Faydwer and EQII Rise of Kunark are being offered by Valve at a special introductory price for the first 10 days the games are available for purchase on Steam. New SOE game accounts for the game purchased will also receive 30 days of gameplay included with purchase (this offer excludes existing game and Station Access accounts).
In addition, the recently released expansions EverQuest Seeds of Destruction and EverQuest II The Shadow Odyssey are available for purchase.
SOE's online games have lost some of their cachet since the 800-lb gorilla World of Warcraft moved onto the block, although I heard some pretty good things about Pirates when it came out. More importantly, their upcoming titles--DC Universe Online and The Agency--both looked hot when we saw them at E3 last year, and Steam availability certainly bodes well for the success of those games.