A 1988 video game for the NES developed by {{Atlus}} and published by HudsonSoft. Originally released in Japan as ''Kame no Ongaeshi: Urashima Densetsu'' ("The Turtle Returns: The Legend of Urashima").

You play as Apollo, a warrior in a white spacesuit with a visor that looks like a duck's bill, as you make your way from island to island in a post-apocalyptic Earth, fighting off bizarre aliens and robots and rescuing a bevy of princesses from their clutches. A variety of special weapons help you on your journey, while aircraft called "cyborg riders" take you from one locale to the next as you try to rescue Princess Maria star from the alien Goruza. Along the way, you meet fairies, disembodied heads, the spirit of King Xu Star, friendly frog-ladies, robot shopkeepers, and giant women in hot tubs. The kingdom of Xexyz depends on you!

Needless to say, it's a bit strange.
!!This game provides examples of:
* AchillesHeel: Every boss has a weak spot of some sort.
* AfterTheEnd
* [[AmericanKirbyIsHardcore American Xexyz Is Hardcore]]: The game's title screen, and a few character and enemy designs, were changed from the Japanese version to the US version to take on a less whimsical, more sci-fi appearance. The flying saucer Apollo rides to combat each platform-stage boss was originally a flying turtle, and the VideoGame/{{Gradius}}-like ship used to finally destroy Goruza's fortress originally had a turtle motif to it. [[http://www.youtube.com/watch?v=hvL60A92g9c Compare the differences.]]
* BettingMiniGame: You bet 20E, and while the Japanese version allows you to win as little as 5E, in the American version the minimum payout is 30E; you always come out ahead.
* BigBad: Garuza, the leader of the aliens.
* BossRush: One of the secret passwords allows the player to challenge all odd-level bosses in back-to-back battles.
* BulletHell: Many of the bosses' attacks were like this. Fortunately, you could counter it with some PauseAbuse.
* DistressedDamsel: The queens of each island, in addition to fairies trapped by enemies.
* FairytaleMotifs: Aside from rescuing princesses, the game was apparently inspired by the Japanese fairytale of Taro Urashima, a fisherman who saves a turtle, goes to a magical undersea palace, comes back to find that a hundred years have passed, and suddenly dies of old age. The connection to the fairytale amounts to a preponderance of undersea-themed enemies and a turtle-shaped spaceship you ride near the game's end.
* GiantSpaceFleaFromNowhere: Every dang boss.
* MultipleEndings: The Japanese version ended with a simple choice between three endings, one of which is a BadEnding.
* NintendoHard: Apollo moves fast, both vertically and laterally, making him difficult to control. Also some bosses can kill you in less than 5 hits, even near the end of the game when your life bar is close to or is already at the max.
* NoPronunciationGuide: The American commercial for the game pronounces the title "ZEX-iss", though other variants ("ZEX-eez") may be heard.
* OurMonstersAreWeird: Up to and including worms with rocket launchers strapped to them.
* PinballProjectile: The 45B Ball weapon bounces off surfaces and into enemies.
* SequentialBoss: Goruza has three forms.
* UnexpectedGameplayChange: The levels alternate between {{Platformer}}, {{Metroidvania}}, and HorizontalScrollingShooter.
* WhenAllElseFailsGoRight