This weekend only, save 50% to 75% on select Sonic Titles! Plus, two new Sonic titles, Sonic the Hedgehog 4 - EP I and Sonic CD, and the new Sonic Generations - Casino Night DLCare Now Available on Steam! Also, when you buy Sonic CD, you'll receive the Metal Sonic Suit in Spiral Knights! Spiral Knights also has the Tails' Tails accessory, can be attached to most armors and gives you two fox tails! Offer ends Monday at 10AM Pacific Time.