Tangentially to all other comments. Though not as prevalent in the 90s as more conventional music software was getting more common also in game music.

But I know that for instance Unreal Tournament 99 used tracker music still.

Tracker music lends it self pretty nicely to the sample chopping origins of jungle/drum and bass.

I was recently part of a jungle compilation for the M8 portable tracker, and got addicted to how fun it is to chop and manipulate drum breaks in the tracker.