do four special ninjutsu techniques. Only one can be performed per life, unless a ninjutsu item was picked up, or the ninjutsu of Mijin was used. A variety of bonus crates can be found in each level, some hidden in the scenery. These include simple powerups such as extra shuriken or health packs, as well as special items to gain lives or extra ninjutsu attacks. Besides powerups, some crates may contain time bombs: explosives that detonate when their fuse runs out or if Joe comes too close (though he can walk out of the blast radius if the player is quick enough). The game is divided into four difficulties. As difficulty increases, more enemies appear per stage; on Hardest, Joe takes twice as much damage and the number of starting lives decreases from 10 to 1. From the options menu, the player can also choose the number of starting shuriken from 0 to 90 (though a technique does exist that allows infinite shuriken). The game has two different endings, depending on whether Joe rescues his bride or not. Development The game's director Noriyoshi Ohba intended Revenge of Shinobi to be a showcase for the then-new Genesis hardware as well as to adapt the series to something better suited for a home console. As a result, the game is more story-driven with Joe Musashi not rescuing multiple hostages in each level as in the original game, but a single hostage at the end. A life bar was introduced as being more appropriate for a console game of that scope. Ohba intended Revenge of Shinobi to have a high level of difficulty to get the player to think about how they could best beat the game. The game's ninja magic was intended to be helpful in particular situations or boss encounters, making certain parts of the game much easier if the player knew which ninja magic to use at what time. Some of the game's enemies are notably too similar to various characters from film and comic books, a fact that Ohba attributes to his own lack of creativity. He made rough sketches of these characters based on what he had in mind at the time, expecting that the character designer would modify them and add their own creative touches for the final game. However, they did not, resulting in some enemy characters who were similar to the likes of Sylvester Stallone,