CD Projekt RED's Witcher sequel can be yours, for a little effort.
OK, so here's the deal with the free games. Mount & Blade is free for the next 48 hours. All you have to do is visit the GOG.com website and claim your free copy. Simple. The Witcher 2 will take a little, tiny bit of effort. Just visit GOG.com once a day and click the 'collect stamp' button. Super easy. Do this once per day, for 7 days, and the game is yours. It also includes a copy of The Gamers: Director's Cut too.
That's the free games sorted, so what about the other offers. Well, there's over 700 games at up to 90% off, so you'll definitely find something in there for yourself, or a friend if you're looking for a gift. A swift look at the store shows me a whole bunch of titles going cheap, such as Super Time Force Ultra, Baldur's Gate I and II, and the other Mount & Blade games.
The GOG Autumn sale ends on 25th November.