Spheres of Chaos

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Spheres of Chaos
Spheres of Chaos cover (Acorn Archimedes).jpg
Original Archimedes release cover
Developer(s) Iain McLeod
Platform(s) Acorn Archimedes (RISC OS), PS2 (PS2 Linux), PC (Windows)
Release date(s) Reviewed in Acorn User December 1992, p. 157
Genre(s) Shoot 'em up
Mode(s) Single-player, multiplayer

Spheres of Chaos is a space shooter video game, created by Iain McLeod, with basic gameplay similar to the classic arcade game Asteroids. It was originally written for RISC OS on the Acorn Archimedes. Ports exist for Linux, Windows and PS2 Linux. The game uses very bright colours and patterns, with many enemies on screen at once. The audio is similar to that of Robotron: 2084 and Defender. In October 2007, Spheres of Chaos was declared freeware.[citation needed]


The player controls a small grey spaceship. At the start of each level, enemies called common aliens appear that must be eradicated to complete the level. With each subsequent level, the enemies get more plentiful and powerful.

When hit, enemies typically split into smaller versions which must also be eradicated. Black holes also appear that either attract or repel the spaceship. Many black holes at once may make the game field unnavigable. When a level isn't completed within a certain period of time, enemies called bugs appear that shoot at the spaceship.

Many types of enemies appear in later levels, from spinshooters to multiplying daisies and bacteria. Often, when all common aliens are defeated, a boss appears that takes many hits to destroy.

When defeated, some enemies provide power-ups that constantly change colour. A power-up's power is determined by its colour when the spaceship captures it.

Players have control over a wide variety of options, including quantities of specific enemies, frequency of power-ups, and visual effects. Spheres of Chaos can be played by one to eight players.[citation needed]


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