Sometimes it is pretty enjoyable to just go and soot, old school gameboy or commodor style.. Steel Storm has the same feeling, and it's free for the first episode. The old Quake3 engine works well, the only thing I miss from the game is some kind of story between the missions.. for example in comic book style, then it would be a perfect small, netbook compatible pack of quick fun. There is multiplayer as well and works in linux/win/mac environment