The World Of Synnibarr is built around this concept, featuring ninjas, Golden Tiger Mages, gods as player characters, and Giant Mutant Fire Clams. And grizzly bears that shoot lasers from their eyes. And a god of rock 'n' roll.
Rifts runs neck and neck with Synnibar for weirdness/awesomeness. It gives us techno-wizards on flying surfboards shooting railguns, vampire-hunter cowboys herding dinosaurs, extraterrestrial bikers, genetically engineered humanoid dogs, Alien Cyborg Samurai, Crystal Dragons, Undead Super Soldiers, Psychic Horses, and a power struggle with the Four Horsemen of the Apocalypse on one side, and King Arthur and his knights in power armour backed up by dragons, demigods and an amnesiac Egyptian goddess on the other side. Oh, and humpback whales who can learn fly-fishing.
Torg is a crossover game where Action Tropes are real and cyberpunks fight minions of the Cyberpope and their plant-zombie minions with the help of pistol-wielding mystery detectives and heroic knights.
Exalted is Fire-breathing cyborg dinosaur precursors with super science vs Communist ninja robots with lightsabers from outer space! It's a game where Cuchulain is riding around in a Gundam to fight Vincent Valentine, who has been enslaved by Emperor Palpatine, while John Talbain and an army of Celts is going to war with the Roman Legions, who are led by the cast of Ranma 1/2. And also have to fight the spawn of Queen Mab and the Joker who want make the world in to a toxic rainbow slush. If it's cool, then it's supposed to be ganked and put into the game! In other words, Best. RPG. Ever. There's a martial art for sadomasochist lesbian stripper ninjas.
Dreadnoughts (essentially, Mecha piloted by practically undead super-soldiers) come dangerously close to being actual zombie robots, as well as the aforementioned Necrons.
Necrons could be considered the very page title. The zombie robot part has been explained, wraiths are quite similar to ninjas in their stealth and material phasing abilities, and Necrons often partake in pirate raids.
The Blood Angels now have Librarian Dreadnoughts, giving them a Zombie Humongous Mecha Cyborg Wizard.
At least one of the unofficial harlequin lists had Harlequin Wraithlords which indeed was a 12 foot tall psychedelic Space Elf Ninja Clown Zombie Robot. Depending on fluff it could be a pirate.
Speaking of the Eldar, here is a fitting description of their heavy infantry, the striking scorpion aspect warriors: power-armored chainssword weilding gunfaced jungle ninjas. Their squad sergeant can fight with an insect-style armor-piercing pincer incorporating a shuriken-firing SMG, to boot.
And various methods when you just have to absolutely, positively, kill every single motherfucker on a planet.
Warhammer has a rather awesome example of this trope in Luther Harkon (a Vampire) and his Zombie Pirates of the Vampire Coast. His crew roster includes Vampire Pirates (himself, possibly others), Zombie Pirates, Zombie Ogre Pirates, and Zombified Sea Monsters. Oh, and the zombies still use blackpowder pistols, muskets, swivel guns, cannons, and Queen Bess, a former Hellhammer Cannon.
While not a part of 'canon' Dungeons & Dragons, the variety of races, templates, and character classes available can result in ridiculous combinations, like a Fiendish Dragonkin Vampiric Samurai Half-Orc Fighter/Wizard/Monk/Shadowdancer. Or a sandwich. Or a chicken slaad sand witch. This is frequently the work of a Munchkin, however it's often ostensibly done for "role playing" purposes.
The ultimate example of this trope came from a specific thread on the Dungeons & Dragons character optimization boards. The end result was A Zombie Ninja Pirate Jedi with a Demonic Cyborg Midget Monkey Schoolgirl sidekick and a small crew of Mutant Zombie Sea Bass, riding in a Transforming Robot Dinosaur, armed with Lightsabers and Eye Lasers. Sadly, the design was considered too dangerous to ever create as it could easily destroy the world.
AD&D is responsible for some of the Oldest Ones In The Book - not just in the munchkin possibilities, but in the Monster Manual. Owlbears. What more needs to be said?
The latest edition offers as one of the playable races the Warforged, which are essentially magical robots. Then, they had an expansion where you can play a deceased-but-reanimated version of any playable race, like an intelligent zombie (at at higher levels can become a ghost too). So you can now play an actual Zombie Robot Ghost!
Actually using a Warforged ninja as the base creature and class, then gaining the zombie template(which can be applied to any corporeal creature) from any creature whose create spawn ability turns you into a zombie, the Emancipated Spawn prestige class(to regain your ninja abilities) and finally the Dread Pirate prestige class can turn you into a genuine Ninja Pirate Robot Zombie.
Teenagers from Outer Space, an 80s game based on Japanese cartoons, pits the characters in an alternate Earth where high schools are overrun with aliens - every kind you can imagine - and teenage humans head to the mall to buy dangerous weaponry in order to wage wars with their classmates. The only rules, besides the bare game mechanics, are the ones that the GM chooses to impose, so it wouldn't be uncommon to see a telepathic raygun-wielding teddybear driving a flying saucer down Main Street while listening to The Pretty Things.
In the early days of White Wolf's old World of Darkness they published a few modules featuring Sam Haight, a ghoul/werewolf/mage whom, Game Masters were told, the player characters were not allowed to kill. After a while even his creators got tired of him, killed him off, and then casually mentioned that his soul had been forged into an ashtray in the underworld.
Even the more sedate game lines had these. Vampire The Masquerade brought us the Giovanni, a vampiric Mafia clan with a history of necromantic practices. Werewolf The Apocalypse gave us the Stargazers, a tribe of enlightened martial artist werewolves. And Mage The Ascension gave us the Akashic Brotherhood, who can kill you with their brain but prefer to do it with kung fu.
Mage: The Ascension was this trope writ large. To wit, the heroes were a collection of pointy-hat wizards, computer hackers, wiccans, kung fu messiahs, mad scientists, shamans, religious zealots, magical stoners, and the Euthanatos.
The toy line/tabletop game Xevoz featured a figure called Skull Jack that was a Skeleton-Pirate-Samurai with laser vision.
Characters in Maid RPG can easily end up as this, depending on what you roll and how many special qualities you use. If you're willing to try for it, it's perfectly possible to have, for instance, a Zombie Catgirl Spider Demon.
Feng Shui is crazy with this. Where else can you find sorcerous kung fu cops, cyborg monkeys who like to BLOW THINGS UP, transformed animal assassins involved in an Ancient Conspiracy, creepy Magitek-modified cyborg demon Super Soldiers from the future, eight-armeddemon-huntingGirls With Guns, a Sinister Minister with a gun-laden church/fortress and a cyborg arm that shoots out razor-edged silver crucifixes, a giant monster mecha left over from WWII in a hidden base in Hong Kong and much, much more? And that's all before you turn your players loose.
GURPS. It's considered handy for crossover campaigns, so...
One of the common jokes used about the system involves coming up with silly game ideas◊ as the game is so well made they could actually be done.
