If you've never ventured into Fallout's radiated wastelands before, now's the perfect time: GOG.com is offering the earliest entries in the post apocalyptic franchise for free. The deal includes both Fallout and Fallout 2, as well as the strategy spin-off Fallout Tactics. All three games are playable on both Mac and Windows PCs. With rumors swirling about the next entry in the series, now is the perfect time to see what the franchise is all about. You can grab all three games at the source link below for the next 48 hours or so (though the site appears to be experiencing some technical difficulties at the time of this writing).