If anybody isn't steam bargained out at the moment, I just got The Darkness 2, XCOM Enemy Unknown and Bioshock 2 for $20 on the Nuuvem Daily Deal
Check here for sales on at the moment:
http://www.nuuvem.com.br/promo/fds-epico
The site is from Brazil, the currency is the Brazilian Real (so essentially halve any of the prices on there), and the language is Portuguese (if you need a google translate). Just check each game before you add it to cart and make sure it has Steam/steamworks (though the three I just bought are definitely steam).
For those wondering, those 3 games aren't sold as a pack for $20. The OP made the 3 individual purchases totalling $20.