8 Eyes is an Action Game developed by Thinking Rabbit, published by Seta Corporation in Japan in 1988, and by Taxan Corporation in North America in 1990.
The story takes place in the aftermath of a nuclear war. After a Great King helped rebuild the world with the power of mysterious jewels he called the 8 Eyes, his generals turned against him and stole the gems for themselves, banishing him to the nuclear wastes before he could complete his duty. It now lies upon Orin, a swordsman and falconer, to fight through each of the generals' castles and defeat the strange creatures and soldiers within in order to retrieve the gems and help the Great King complete his mission.
- Affably Evil/Graceful Loser: The dukes all share tea with you after being defeated and surrendering their gem.
- Africa Is a Country: The entirety of Africa is represented by a single duke. The same goes for Arabia; if you define it as countries in the Arab League, it consists of twenty-two separate nations. Making that particularly weird is that Egypt gets its own duke despite being part of "Arabia" (and Africa!).
- All There in the Manual: You'd only know the setting is supposed to be in the post-apocalyptic future by reading the manual. In-game, the aesthetics borrow a great deal from the original Castlevania, and as a result the setting looks vaguely 17th-century. Theres also the fact that one of the subweapons is a handgun.
- Asymmetric Multiplayer: In 2-player mode, one player plays as Orin, and the other plays as Cutrus. The player playing Cutrus can fly freely around the screen to attack enemies, whereas in 1-player mode, he can only fly horizontally once released.
- Attack Animal: Orin can use his falcon, Cutrus, to attack enemies he can't normally hit, or to uncover secret blocks he can't normally reach. The Duke of Italy also has a pet panther that fights alongside its master both times you face him. Defeating it isn't necessary to clear the stage, however.
- An Axe to Grind: The boss of the Africa house uses an axe, which he occasionally throws at you.
- Bag of Spilling: Any power-ups you earn are not retained between levels.
- Battle Boomerang: A standard boomerang is one of the special weapons.
- Boss Rush: The House of Ruth features rematches against six of the seven Dukes from the earlier stagesnote before fighting Lady Ruth herself.
- Death Dealer: The boss of the Italy house specializes in razor-sharp playing cards.
- Dem Bones: Skeleton swordsmen show up in the Egypt and Arabia houses. After defeating a duke, a skeleton waiter comes to serve Orin and the duke drinks.
- Enter Solution Here: After defeating Ruth, the final level is a puzzle where Orin must place the 8 Eyes in a certain order. Clue to their order are found on scrolls hidden in each level.
- Fuuma Shuriken: The boss of the Germany house tosses giant throwing stars.
- "Get Back Here!" Boss: Bosses that use ranged attacks tend to use this tactic. The dukes of Italy and Germany are really bad about this.
- In a Single Bound: Unlike the other bosses, the Egyptian duke can leap at you at great distances, so forget about trying to stay safe on a higher ledge.
- The Maze: The Africa and Germany houses aren't straightforward like the other levels, and require you to enter rooms in a very specific order to proceed.
- Mega Manning: Defeating a duke gives you a sword that deals double damage to one of the other dukes. You aren't told which one. One pattern that works is Spain, Egypt, Italy, India, Africa, Germany, Arabia.
- Mineral MacGuffin: The eight gemstones.
- Molotov Cocktail: One of the special weapons.
- New Game+: Not one, but two, differences including absence of the clue scrolls and the speed of the enemies.note
- Nintendo Hard: You have only one life to get through a stage. If not for the password system, it would almost be unwinnable.
- Sinister Scimitar: The soldiers of the Arabia stage.
- Suspicious Video-Game Generosity:
- Each Boss Room in Ruth's castle has a hidden potion that completely restores your health. It'll be difficult to make it to the end without using at least one of them.
- Speaking of the House of Ruth, you'll notice immediately upon entering that unlike every other stage in the game, you start out at full power and with all weapons. Why would you need that? For the Boss Rush you'll have to deal with.
- Teleport Spam: The boss of the India house will occasionally blink out of the way if you deal enough damage to him, a trait he shares with Great Tiger from Punch-Out!!.
- Whip It Good: Ruth's Weapon of Choice.