Steam announces ten games from PlayFirst were added to Valve's online service today. To celebrate they're discounting each game 10% for one week. Also, Meridian 4 announces the continuation of their fifth anniversary celebrations, which may well stretch until their sixth anniversary. GamersGate is offering their titles for 50% off, and a Meridian 4 Super Pack for $79.95, a $203.99 savings off the $283.94 list price for this bundle of all their games.