Sonic the Hedgehog

The plot of the game is simple. The evil Dr. Robotnik has captured many of Sonic's animal friends and trapped them inside robots. Fortunately, Sonic can free his friends by destroying the robots with his spin attack. Meanwhile, Dr. Robotnik is trying to control the all-powerful chaos emeralds. Sonic must grab them before he does in the 3D rotating bonus levels.

The gameplay revolves around speed and precision jumping. Sonic's weapon is his spin attack; while jumping, Sonic destroys hostile robots by touch. Throughout the platforming levels, Sonic collects numerous rings. If Sonic is hit by an enemy, all the rings he's carrying fall out and scatter around; Sonic can quickly grab the rings back before they disappear. If Sonic is hit while not carrying any rings, he dies. Collecting 100 rings gives Sonic an extra life. There is also an invincibility bonus which temporarily protects Sonic from all attacks.