I redesigned a whole forum for a mod last year. Unfortunately it was not enough to attract a complete team. I did this all over a weekend and there is much much more I'm not showing too.
First of all don't get beat down by a mod not working. I think i've worked on 4 mods over the past years, ranging from Half Life, Unreal Tournament and Red Alert mods. So it's a pretty shifty area.
Second of all, i love what you did around here. I do have a few suggestions though.
The firs image looks very nice but i think the overburnt paper texture is a bit too strong for it. What it does is actually rival with your drawing. When the subject of the drawing and the drawing support itself rival, you can lose the viewer's attention. It's always in your best interest to direct the viewer's eyes towards the area you want him to see. Color usage, surfaces, textures, lines, they can all direct a viewer. Here, i feel the viewer is directed towards the texture rather than the character.
The No Man's Land logotype is neat and works great for a game. Well done there. It's flavorful, easy to read and has just the right dosage of awesomeness.
Overall, great work here, Raoul. I must add, as a personal note that the limited usage of white in these images could have improved visibility and contrast. Some white on the soldier's helmet for this last image for instance, would've made him stand out some more.
Thanks for posting in the Graphic Design area mate, can't wait to see more.
I like the look.
I might have tried a different typeface for the "To learn more visit us at" because the thin parts get lost in the textured background, making it a little hard to read. (Especially the "L" in learn) Although I imagine if you changed the texture, like Sickbrush mentioned, that may not be an issue.