Defender is a scrolling shooter developed by Williams Electronics and released in North American arcades in March 1981; Taito distributed it in Japan. It was the first video game project of Eugene Jarvis, who designed it with Larry DeMar after working on Williams pinball machines.
It is considered the first side-scrolling shoot 'em up, predating Scramble by two months. Jarvis drew on Space Invaders and Asteroids: the wraparound playfield and scrolling grew out of Asteroids and brainstorming. Rescuing abducted humans is central to play, since they die if they fall from a height or are shot. The hardware was ambitious too: a 320×256 screen wider than the 256×256 standard of the time, with a Motorola 6809 for graphics and gameplay and a Motorola 6800 for sound.
Defender quickly became a competitive game. Twin Galaxies' first contest, in April 1982, was won by Rick Smith with 33,013,200 points.12
Names and releases
| Region | Title on the box | Platform | Date | Publisher | Src |
|---|---|---|---|---|---|
| NA | DefenderShown at the 1980 AMOA trade show | Arcade | March 1981 | Williams Electronics | 1 |
| NA | DefenderAtari 2600 | Other | June 1982 | Atari, Inc. | 1 |
| NA | DefenderAtari 5200 | Other | December 1982 | Atari, Inc. | 1 |
| NA | DefenderColecoVision; VIC-20 version October 1983, TI-99/4A November 1983 | Other | December 1983 | Atarisoft | 1 |
| NA | DefenderGame Boy; also released in Europe in 1995 | Game Boy | October 1995 | — | 1 |
| NA | Williams Arcade's Greatest HitsCompilation; platforms not listed in the source | Other | 1996 | — | 1 |
| NA | Midway Arcade TreasuresCompilation; platforms not listed in the source | Other | 2003 | — | 1 |
| JP | ディフェンダーDifendāEnglish Wikipedia gives February 1981; Japanese Wikipedia gives 1980. Taito imported and distributed it in Japan | Arcade | 1981 | Taito | 1 |
| EU | DefenderLate 1981 | Arcade | 1981 | Williams Electronics | 1 |
| EU | DefenderBBC Micro; renamed Planetoid in 1984 to avoid litigation | Other | 1982 | — | 1 |
Version differences
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GraphicsAtari 2600
Because of hardware limits, the Atari 2600 port swapped the planet landscape for a city.1
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TitleBBC Micro
The BBC Micro version was released as Defender in 1982 and renamed Planetoid in 1984 to avoid litigation.1
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TitleStargate home ports
Some home ports of the arcade sequel Stargate were sold as Defender II.1
Reception
Defender sold more than 55,000 arcade units, Williams' best-selling arcade game, and 70,000 units as of 2020; by 2000 it had earned over $1.5 billion worldwide. It was the second highest-grossing US arcade game of 1981 behind Pac-Man, the Atari 2600 version sold over 3 million cartridges, and in 2025 it entered the World Video Game Hall of Fame.1
In lists
Sources
Checked: 2026-10-13Text reviewed: 2026-10-13
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