The filing covers "computer game software for personal computers and home video game consoles" as well as "motion picture films about action and adventure."

Going by its official website, Gearbox currently has three unannounced projects in development alongside Aliens: Colonial Marines. However, there's no guarantee that "Z-Day" is among those projects--last year, the company filed for several War Hero trademarks, including World War II Hero, but explained that such a project was "something down the road" and had yet to be discussed with any "potential partners."

We've reached out to Gearbox for additional details, and will update accordingly.