Lore

Intro:
The premise of Galaxy Heroes is quite simple. You are a spaceman whose task is to destroy the criminals, scum, and other enemies of the galaxy. As of 2/17/17, not much lore is present.

Location:
Although this is vague, we know that the game takes place in a large space station, complete with an armory, living space, and a teleportation array.

When entering combat, you head through a portal, into various sectors, all full to the brim with angry aliens. These sectors (as of 2/17/17) consist of labs, factories, mansions, caves, and boss battles.

Objective
According to the various NPCs, your job is do destroy the criminals of the galaxy. It doesn't get much deeper than that. It can be assumed that these enemies are not just criminals, being heavily armed, armored, and having plenty of men and APCs to throw around.