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The Gaymersgate discount expires in about 6 hours, & Sleeping Dogs in about 12 hours.
Eador Masters of a Broken World $5 http://www.gamersgate.com/DD-EMBW/eador-masters-of-the-broke…
Eador Genesis (the forerunner, the site says 50% off but it is 75% off the Steam price) $1.50 http://www.gamersgate.com/DD-EADORG/eador-genesis
Sleeping Canines + All DLCs $8 http://store.steampowered.com/sub/35243?snr=1_8_4__501
Despite the Sleeping Dogs Collection only listing 17 items (and no mention of the nightmare on North Point addon) it does in fact include all 26 DLC mentioned on this page