To provide a hard carry type game machine having a new interest enabling a trading game to be performed, a game method and a storage medium by connecting the hand carry type game machine with various kinds of sensors and utilizing external factors obtained from the sensors as game input information.

The hand carry type game machine is constituted by being provided with a battery, a game control part 20 which is driven by power of the battery and advances a game by a game program, a box body 1 of a rectangular shape in a plane view which is provided with a flat display 5 at the inside, a key input switch 2 provided on a surface of the box body 1, a writable storage means 200 which is electrically connected with the game control part 20 and external information collection means 100, 101 which are electrically connected with the storage means 200. The external information collecting means 100, 101 collect external information by an operation of the key input switch 2, external information is stored in the storage means 200 and the game control part 20 advances a game by utilizing external information stored in the storage means 200 based on a game program.