Think you've played every Mario game out there? There may be just one that's off your radar and you may have missed, but now you can take a look at it in detail. New Super Mario Bros. Wii Coin World was a special arcade collaboration between Nintendo and Capcom from back in 2011. With a name like New Super Mario Bros. Wii Coin World, which is quite a mouthful, you'd expect the game to play similar to the 2009 Wii title, and you'd be about half right.

The game is for up to 4 players and you can choose to be Mario, Luigi or one of the two Toads who must, as usual, rescue Princess peach from Bowser. The similarities end there, because rather than running and jumping through courses, you play slot machines and random mini-games! The machine also doesn't take real money either. You have to trade your cash for tokens (called "medals" in Japanese) and use them instead. Actually it's a better deal for you because 100 yen (about $1 or 75p) will give you 10 plays as opposed to the usual one play most coin-op machines give.

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The game works by placing bets and spinning the slot machine. You will lose more often than not, but if you get certain combinations, like 3 of the same icons in a row, or Yoshi eggs, you'll gain more medals, which gives you more chances to play. Other icons - like question mark blocks - will also appear and, if they do, you get to play a mini-game for a chance at even more medals, or to raise your power meters, or get keys. Get enough keys and a high enough power meter, and you'll fight Bowser and maybe save the princess. It will take a lot of medals to get there though.

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If you win a large amount of medals through playing the game, you can play for a long time on little money. You can also cash out and take your medals to another slot or medal type games, but that's about all you can do. Gambling is illegal in Japan, and so you can't take your medals and trade them back for cash or even prizes, at least not legally.

To see the game in action, check the video below. It's an interesting adaptation on the classic Mario formula. It also wasn't the last time Capcom and Nintendo teamed up as well. There have been several Mario Party Arcade releases in Japan over the last decade, and 2015 saw the release of Luigi's Mansion Arcade in Japan, which did see an official English version released earlier this year.

If you liked this video be sure to check out Gaijillionaire's Club for more things retro, Nintendo and Japan.