It is the 40,000 millennium, the grim far future, and there is only war. The game begins with an alert about an Ork invasion on the forge world of Graia. Several options are suggested, but due to the fact that the Titan Invictus is currently on this planet they are not able to just scour the planet from orbit, and they cannot wait for a fleet to come and help. This is where Captain Titus (you), Sidonus, and Leandros come into play. These three are Space Marines, Ultramarine chapter. It is up to them to take down the Orks and protect the Titan until reinforcements arrive. These three are a good choice for this. As they go in they know there is nothing down there they cannot handle. A few thousand Orks can be taken care of in a few weeks if they had the time. Thus you use jump packs to enter the fray. Talk about a way to make an entrance.