It's been over half a year since Interplay's license to sell the original "Fallout trilogy" - Fallout, Fallout 2 and Fallout Tactics - expired. The games were removed from all digital distribution sites as soon as that happened, although Bethesda promised that they would eventually return to Steam (but not to GOG, god forbid). Well, today they've done that, just in time for the Steam Summer Sale. From the official Bethesda Blog:
I've tried the new versions out myself, and from what I can tell the games appear to be unaltered other than the addition of Mash's well-known hi-res patches for Fallout 1 and Fallout 2, Sfall for Fallout 2, plus a Bethesda-style pre-launch splash screen menu and updated readmes for all three of them. The Interplay logo, "By Gamers, For Gamers", "Brian Fargo Presents", it's all still there. Not too bad, actually. Don't hold your breath for a GOG re-release, though.