A few freebie and sale DRM-free offerings to consider:
Gog.com (only sell DRM-free games, often with bonus extras) is holding their Winter Sale, and are offering a free video game until the end of today (Dec 2nd, another 14 hours to go, according to the timer):
Neverwinter Nights Diamond, a popular fantasy role-playing game (
Wikipedia) for Windows @
Gog.com. This version comes with the soundtrack and extra artwork.
You can also
earn bonus XP points by doing activities and via shopping the sales discounts, which may add up to another free game if you accumulate enough. And they offer a substantial page of regular older freebie games as well,
which you can see listed here.
Speaking of DRM-free games, I'm going to mention that if you happened to like the O'Reilly Humble Book Bundle for computer programmers, the current
Humble Staff Picks Bundle: Nick for under $5 USD, good until Tuesday, contains two high-quality programming games from Zachtronics: one which simulates assembly language programming, and the other a robot factory. These are very well-reputed in educational gaming circles (and were on my wishlist, so an auto-buy for me), and you can also try some freebie flash games along the same lines over at the
Zachtronics site.
And BookViewCafé has
rotated their monthly specials, with a lot of 99 cent deals, especially sfnal ones.