Defender (Arcade)

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Arcade, March 1981
            Series : Defender
         Developer : Williams
             Genre : Scrolling shoot 'em up
            Themes : Alien Invasion
      Release Info : MiSTer implementation
        Other Tags : Motorola 6809
             Ports : Defender (1981 A2600)
                     Planetoid (1984 BBC) [unofficial]

not completed.


Scores - MAME:
 30550 ...........  on 2013-12-08
 26925 ...........  on 2014-12-10

Other scores:
 25900 ...........  on 2020-07-27

Other scores:
 23250 ...........  on 2022-09-17
 22850 ...........  on 2020-02-29
 22250 ...........  on 2014-12-03

Log entries

  • Got the score 30550 in MAME.
  • 2014-12-03
  • Got the score 22250. For the first time, I played Defender on the original hardware. Ruben & Bobbie in Copenhagen has a machine, and I struggled with the button layout and got this one decent score after spending a lot of 5 DKK coins...
  • 2014-12-10
  • Got the score 26925 in MAME. Theres been quite a bit of Defender going on on the PD MAME machine. Me and Jeppe are narrowly competing for the top.
  • 2015-02-14
  • Preparing for my talk at Spilbar on 80s game music and audio technology, I looked into the audio implementation of Defender. It's basically a MC6800 that outputs 8-bit samples to a DAC. All code and data is in a 2048 byte ROM. I've now managed to disassemble and reassemble the ROM and figure out how parts of it works and even write my own replacement ROM with test sounds!
  • 2015-02-23
  • My newest Defender sound ROM plays a two-channel music loop, specifically a beepy version of the Lost Empire: Immortals theme.
  • 2015-03-11
  • This Sunday, I armed myself with a MC6800 manual and Visual Studio, and made a working Defender sound board emulator in C++. It currently only plays the boot sound, because I haven't implemented the full instruction set yet.
  • 2020-02-29
  • Got the score 22850. I found a Defender cabinet at the Brooklyn Barcade. There was a hiscore by a mysterious person 'A' (the name you get if you just press the button instead of entering your initials), and after many quarters, I started getting used to the button layout and stopped accidentally using smart bombs instead of reversing direction. I ended up with no. 1 spot of 'ALL TIME', 22,850.
  • 2020-07-07
  • I played a bit of Defender on the MiSTer, but I had trouble with the controls. I need to spend more time setting them up.
  • 2020-07-27
  • Got the score 25900.

    I have a recorded game on YouTube, forgot where I recorded it from.

  • 2022-09-17
  • Got the score 23250. The Finnish Museum of Games arcade had a Defender machine, and I got first place in the high score list.

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