This is a game software for the Sega Master System, manufactured and sold in Brazil in the 1990s. The game title is "Sonic Chaos," and it comes with a game cartridge, instruction manual, and a special edition poster featuring Sonic the Hedgehog. It is a vintage item purchased in Brazil as a collector's item. The box and contents are all in Portuguese. There is some aging due to the manufacturing year (1993), but the operational condition is good.