It has been so long since I've seen the Wacky Game Jokes series. I don't recall this theme song at all. HotDiggedyDemon doesn't seem to be working on it lately. It's great how all my favorite authors are connected to each other in some way. Granted, I'm not sure if this is an official work. Due to my memory, I don't know how authentic this is to the original song.
It certainly sounds great! I can hear some strong use of the piano in this. The title made it seem like it was about Warhammer 40K. That's just really popular. I'm glad to hear this brief, happy song.