Tracker were software - used especially on the Amiga. The most of the music was created in this type of music software. And the people behind the swiss games of the 80ies/90ies even created a tracker and the possibility to use the same framework also in games. 

The game development process was splittet into different type of productions. Each part had its own tools like coding / assembler, images > paint tools and of course music with the trackers. 

GameDevs are gamedeveloppers. The name tells also a lot about the idea behind. The most important thing was the technical difficulties.