Sea Dragon
Sea Dragon is a horizontally scrolling shooter for the TRS-80 computer written by Wayne Westmoreland and Terry Gilman and released in 1982 by Adventure International. The gameplay is similar to the Scramble arcade video game, but underwater. It was ported to the Apple II, Atari 8-bit computers, Commodore 64, TRS-80 Color Computer, and MS-DOS. The TRS-80 and Apple II show the scenery as outlines, while the other versions use filled color graphics.
Sea Dragon
- Date
- 1982
- Publisher
- Sea Dragon was published by Adventure International.
- Genre
- side-scrolling video game
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Documentary summary
Sea Dragon is a horizontally scrolling shooter for the TRS-80 computer written by Wayne Westmoreland and Terry Gilman and released in 1982 by Adventure International. The gameplay is similar to the Scramble arcade video game, but underwater. It was ported to the Apple II, Atari 8-bit computers, Commodore 64, TRS-80 Color Computer, and MS-DOS. The TRS-80 and Apple II show the scenery as outlines, while the other versions use filled color graphics.
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wikidata · Q4049208
In this article
The object
The object
The Apple and Color Computer ports include digitized speech. In 1995, Wayne Westmoreland placed the game into the public domain. In January 2016 the source code for the Atari 8-bit version was released to the public and added to the Internet Archive.
Key facts
Key facts
• Title — Sea Dragon • Publisher — Adventure International • Released — 1982: TRS-80, Apple, Atari 1983: CoCo, IBM PC 1984: C64 • Designer — Wayne Westmoreland Terry Gilman • Programmer — TRS-80 Wayne Westmoreland Terry Gilman Apple II John Anderson Atari 8-bit Russ Wetmore Commodore 64 David H. Simmons Tandy CoCo Jim Hurd IBM PC Hervé Thouzard • Genre — Scrolling shooter • Modes — Single-player • Platforms — Apple II, Atari 8-bit, Commodore 64, MS-DOS, TRS-80, TRS-80 Color Computer
Gameplay
Gameplay
• Illustration — The player's sub is heading toward a cave (Atari 8-bit). The player controls a submarine that can shoot torpedoes both forward and upward. The gameplay involves navigating "past underwater mountains and through labyrinthine passages while avoiding webs of explosive mines that rise from the sea bottom. Additional dangers include mine-dropping ships, enemy attack stations, falling stalactites, and deadly lasers—any of which could keep you from your ultimate goal: destruction of the incredibly powerful nuclear reactor at the end of the undersea course." (Adventure International catalog, 1982)
Speech
Speech
The Apple II version uses digitized voice that says "Sea Dragon!" When the user starts the game, he or she is told, "Good day, captain! Your ship's computer is now ready. Please wait while I initialize systems!", and during the game will be informed, "Air level critical!", "Checkpoint!", and "Approaching maximum damage!" The use of speech was a novelty, as the Apple II speaker is only able to emit a one-bit click. Programming Sea Dragon to play back an audio sample is a technical achievement shared with Castle Wolfenstein (1981), Dung Beetles (1982), Creepy Corridors (1982), and Plasmania (1982). The Color Computer version is the only other version that includes speech. It says "Welcome aboard, Captain!" on the title screen.
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- United States
Named but not plotted · 1
Sea Dragon is associated with United States.
Country
Reception
• Illustration — Atari 8-bit title screen Writing for Video magazine in 1983, Ivan Berger noted that Sea Dragons graphics were dominated by "simple patterns and primary colors". This Berger contrasted with the "more subtle colors and shadings that go into professional animation", however Berger noted that while Sea Dragon was emblematic in this regard, the chromatic and graphical simplicity of the game was endemic to the home computer game medium.
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Hague, James. The Giant List of Classic Game Programmers.
- 2.games-by-wayne-westmoreland-and-terry-gilman
- 3.Three Atari 8-bit games source code have been released on commodore.ninja by Paulo Garcia (on Jan 5, 2016)
- 4.Berger, Ivan. Computer Ease: Graphics–What to Expect and Why. Video. Reese Communications. 7. 2. 24–25. May 1983. 0147-8907.
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General reference
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 19 August 2026.
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