Play Super Mario Bros. 3 Online Free

UPDATE: IMPORTANT NOTE! This game uses the latest version of the Java Runtime Environment. If you have issues please go here and download the latest version for your browser. I apologize if you have issues when loading this page. The good news is that you now know your Java is outdated :P

By far the best Mario game for the NES, and now it can be played online free.

Click in the screen to make it active. I put it here because it is more likely that my site will pass a work firewall ;) . Controls and instructions are listed below the game.


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To get the player select to pop up on the intro screen you need to hit “Enter” and then “Enter” again after you make the selection. Not sure how to select a 2 Player game though. If someone figures it out please leave a comment. You hit “X” to enter a level. The only other thing that isn’t easily figured out is the selecting one of your items on the World Screen. That is where you can hook yourself up with a mushroom, leaf, plant, etc. Just hit “Z” while on the world screen to access that.

The controls are:

Right Arrow = Move Right
Left Arrow = Move Left
Up Arrow = Enter Section
Down Arrow = Enter Pipe / Duck
X = Jump / Enter Level
Z = Run Faster / Fly
Enter = Start

Be aware of one thing though when you play this. If you switch to another window on your browser you will need to click in the window to de-activate inputs from being for the game. Like if you need to fill out a form or something you need to click on the screen somewhere before it will let you do it. Not sure why at this point, but it doesn’t mean you need to go to drug rehab or anything. It’s just how it is.


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  • 20 Comments so far

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    1. Jedi553 on June 13th, 2008

      i figured out how to get 2 player game you just need to press Alt Gr putton and that´s it have a nice time playing with you friend.

    2. Funeral25 on June 25th, 2008

      I couldn’t figure out the controls for the 2nd player, anyone know?

    3. tina on July 16th, 2008

      I <3 this game soo much times like 100000000

    4. anonomyous on December 21st, 2008

      YALL SUCk I MEAN THIS GAME SUCKS I MEAN U SHOULD LEAVE THE WORLD
      !!!!!!!!!!!

    5. ninjakiwi on March 17th, 2009

      the first reaply is a big fake!

    6. pac-man on March 18th, 2009

      i like the troll he’s cool!

    7. ad on July 13th, 2009

      very bad

    8. John S. on August 6th, 2009

      CaN someone tell me how to make player 2 move on the world????

    9. Heather on August 22nd, 2009

      To get to second player you have to hit the ctrl key. Now when you get there does anyone know which keys to use to make the second player move?

    10. sammy on September 11th, 2009

      i need a controller. a bit difficult with the arrows on the right

    11. john on September 13th, 2009

      awesome game dude i love it!

    12. JUNIOR on October 21st, 2009

      THIS GAME IS DUMB.

    13. Mel on November 23rd, 2009

      To select 2 player just push ctrl to scroll down n then push ‘X’ to enter like normal

    14. Michael on January 23rd, 2010

      On macs, you press control to move the arrow at the beginning to scroll between a one-player and a two-player game.

    15. carly on March 25th, 2010

      does any one know where to get a controler from this game is my favorite

    16. Mario on April 14th, 2010

      How do you jump?

    17. Princess Peach on April 19th, 2010

      I know how you choose 2 players. You hit the control key. That key is the select button.

    18. maxsteall on May 21st, 2010

      is super mario 3 all ways slow on computer?

    19. joseph on August 3rd, 2010

      wowooo i like this site.

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