Instruction:
Classify each of the following as either a Sega or Nintendo game: Super Mario Bros, Sonic the Hedgehog, Altered Beast, Road Rash, Legend of Zelda, Ecco the Dolphin, ToeJam & Earl, Metroid, Chrono Trigger, Donkey Kong Country

Response:
Nintendo: Super Mario Bros, Legend of Zelda, Metroid, Chrono Trigger, Donkey Kong Country
Sega: Sonic the Hedgehog, Altered Beast, Road Rash, Ecco the Dolphin, ToeJam & Earl