Simon (game) also released in the US, with an aesthetic recalling that of the 1970s and 1980s models. Recently, Hasbro has released Simon Optix, a headset game with a motion sensor technology similar to Simon Air. The device has four colored buttons, each producing a particular tone when it is pressed or activated by the device. A round in the game consists of the device lighting up one or more buttons in a random order, after which the player must reproduce that order by pressing the buttons. As the game progresses, the number of buttons to be pressed increases. (This is only
The Revenge of Shinobi other than the opening animation (i.e. no plot text or gameplay demos). Using Mijin uses up ninjitsu; in other versions ninjitsu is still available after using Mijin. Mijin also remains selected after it has been used, instead of switching to Ikazuchi. There is also no shouting sound effect when ninjutsu are activated. The final game has 19 music tracks, but this version only has the first seven (the order of music in the sound test is unchanged). Because of this, there are differences in what music is used for what round, but even when the music is in all versions,