Another day, another videogame-related legal battle. This time, it’s Bethesda that’s putting on its hockey mask and revving up the litigation machine while Interplay attempts to avoid paying an arm and a leg in return for what Bethesda calls “willful infringement.”

The gist of it goes like this: Current Fallout publisher Bethesda says that Interplay never acquired the proper rights to re-release earlier Fallout games digitally or in any other form. Interplay, who sold the Fallout series to Bethesda back in 2007, has been distributing Fallouts 1, 2, and Tactics for quite a while now – apparently against Bethesda’s will.

Bethesda’s also taking aim at Interplay’s still-unconfirmed Fallout MMO, supposedly codenamed “Project V13.” As part of an agreement, Interplay was supposed to have raised $30 million and entered “full-scale development” on the game by April 4, 2009. Bethesda contends that Interplay failed to reach this milestone, thereby terminating the agreement.

Interplay, however, claims that everything’s fine and dandy as far as the agreement’s concerned, and that Bethesda had no reason to terminate. Bethesda, meanwhile, also takes issue with Interplay’s unapproved Project V13 funding agreement with Masthead Studios. To this, Interplay simply replied that V13 is a different project, separate from its Fallout MMO.

And that’s only the short version of this extremely convoluted tale. If you’d like to know more and have nothing better to do for, oh, the next 4,234 years, you can read all about it here.