ウィキペディアより引用 Silver Surfer is a video game released for the Nintendo Entertainment System, developed by Software Creations and released by Arcadia Systems in November 1990 in the United States. There have been no known releases in other regions. The game is widely known for its extreme difficulty as a shoot 'em up game, so difficult it has been said to be one of the hardest games ever made. In fact, if the player is able to beat the game, a password can be enabled to make it even more difficult.