Source: ModDB
Related: Dulce Et Decorum

Brand new Dulce Et Decorum concept media has been released over at their ModDB Gallery:

We've had another windfall of concept art including another batch of weapons. The futuristic GEC art is finally starting to arrive and it can all be found in our gallery. There are more, including some early map sketches on the way.

Check the Dulce Et Decorum site for more.