It is the 4th millenium and mankind is at war with the Vossk Empire for the control of many star systems. Keith T. Maxwell is a mercenary working for criminals, the Terran Alliance and even the Vossk Empire, using his booty to better his business.
Galaxy on Fire is a 3D space shooter with trade elements. The player takes on the role of Maxwell, engaging on missions for money and goods which can be traded with 10 different species. The price of goods fluctuate according the offer and demand from 500 planets and space stations. Ten spaceships are available to be chosen from and can be upgraded with new weapons, shields, drives and such.
The spaceship is controlled from a third person view in missions such as escorting transport fleets or combats against the Vossks. Controls include shooting (which can be set to auto-fire), changing weapons and activating an afterburner (which has to be recharged after use).