Groupon offers a credit for three Big Fish Games downloads for $9. (You'll receive an individual voucher for each game.) That's $3 per game and the best such offer we've seen from Big Fish Games. (Downloads usually start at $9.99 and up, outside of new customer offers.) You can redeem these vouchers on more than 2,500 Windows and Mac game downloads. Collector's Edition and iOS games are excluded from this offer.

Of note, you can purchase a credit for six Big Fish Game downloads for $18. (Again, you'll receive an individual voucher for each game.) All credits expire May 27, 2013. Deal ends December 26.