Amiga demos are demos created for the Commodore Amiga home computer.
A "demo" is a demonstration of the multimedia capabilities of a computer (or more to the point, a demonstration of the skill of the demo's constructors). There was intense rivalry during the 1990s among the best programmers, graphic artists and computer musicians to continually outdo each other's demos. Since the Amiga's hardware was more or less fixed (unlike today's PC industry, where arbitrary combinations of hardware can be put together), there was competition to test the limits of that hardware and perform theoretically "impossible" feats by refactoring the problem at hand. The Amiga was the undisputed leader of mainstream multimedia computing in the late 1980s and early 1990s, though it was eventually overtaken by PC architecture.
Some Amiga demos, such as the RSI Megademo, or Crionics & The Silents "Hardwired" are considered seminal works in the demo field. New Amiga demos are released even today, although the demo scene has firmly moved onto PC hardware. Many Amiga game developers were active in the demo scene.
The demo scene spearheaded development in multimedia programming techniques for the Amiga, such that it was de rigueur for the latest visual tricks, soundtrackers and 3D algorithms from the demo scene to end up being used in computer game development.
Read more about Amiga Demos: Demo Software, Intros, Ripping, List of Amiga Demo Groups, List of Amiga Demos