ACL Injury. The anterior cruciate ligament (ACL) works together with the other ligaments in the knee to connect the femur to the tibia and support the knee joint. A tear in the ACL is one of the most common knee injuries, causing the joint to become unstable and slide forward too much.
There more than 6,000 games currently available on Steam. If it seems like there's a flood of new games on the digital distribution outlet pumped out each and every day that's because new and old developers and publishers are putting up titles all the time.
Steam has recently create a bunch of 'Trading Cards' and a Steam level version of the achievement system. Because of the Steam sale a bunch of these cards are being given away with the name of games you don't own attached. You didn't really get the game, you received a trading card based on the game, and that went into your steam inventory.