This Sega Genesis Plug and Play game works and is good shape. You can power device by using a d.c. 6v power cable that is sold separately. If you want to use batteries the head of the screw that holds the back cover over the batteries got stripped and I don't have the proper tool to remove it. The game Requires 4 AA batteries which are not included. If you can remove and replace screw then all is good. Includes: Sonic the hedgehog 2 The ooze Gain ground Ecco the Dolphin Columns Alex Kid in the enchanted Castle