Picked up Alan Wake... Under $10 isn't a bad deal.
As for the Witcher... I couldn't get into it either. I bought it after they produced the no-DRM enhanced version... and I got to the first town, and that was about it. The combat just really really sucked, IMO, and I'm not a combat-whore for an rpg. As for The Witcher 2... I don't even want to risk the cash, even if the combat is different.
Legend of Grimrock... I bought it and got to level 3. I'm waiting for the IOS version, because it's a perfect game for a tablet and I don't want to spoil it by playing it through on the PC.