Maelstrom
Steer a lone ship through drifting rocks and increasingly crowded waves of arcade mayhem.
Andrew Welch, 1992

Source and version
This is Maelstrom 1.4.3 in its original MacBinary installer. It remains sealed as Ambrosia distributed it; Systemless opens the installer and finds the game at launch time.
In the asteroid field

Maelstrom begins with the lovely economy of an arcade cabinet: one small ship, a screenful of rock, and nowhere to hide. The first wave leaves room to learn the ship's momentum. Later waves fill that quiet black field with splintered asteroids, enemy craft and bonus capsules until survival becomes a rhythm of thrust, turn, fire and last-second shielding.
Choose “Not Yet” at the original shareware registration prompt, then press P to start. Space fires; the on-screen Fire, Shld and Go controls are also available.
The details give it its own character. Rocks tumble rather than merely slide, the ship carries visible damage and every cleared wave grants only a short breath before the next arrives. High scores sit on the opening screen as both invitation and accusation.
Shareware
Ambrosia released the complete game as shareware with a 30-day evaluation period. Its contemporary FAQ actively encouraged people to copy the software for friends, while asking players who kept it to register.
License
Licensing information recorded for this game archive. These terms are separate from the Systemless runtime and website licenses.
Game archive
- License
- Ambrosia Software shareware
- Rights holder
- Ambrosia Software, Inc.
- Redistribution
- Recorded as permitted
Permission
Ambrosia's shareware FAQ encourages users to copy its products and give them to friends, subject to paying after the 30-day evaluation period.
Notes
Untouched Maelstrom 1.4.3 MacBinary installer independently retrieved on 2026-09-15. The 1,156,480-byte file has SHA-256 194be3d54a5969336c99260829e808f5a2af1a19ce720bacc80bbc0bad507fa0. Its SHA-1, 1413d439dd4a25ecaa8f968f67c920aeab3d7e98, matches the separately catalogued copy at Macintosh Repository.
Sources
Screenshots, plugins and other files may have different terms. See their individual catalogue records in the repository source.