Sniper Elite developer Rebellion is suing Sins of a Solar Empire publisher Stardock over the name of that game’s latest expansion.

The trademark suit alleges that Stardock knowingly infringed on Rebellion's name trademark by calling its just-released Sins standalone expansion “Rebellion”.

Rebellion said that consumers were deliberately led to believe that it was the developer of the game.

It also claims it was "deprived of substantial sales of its products" and that the expansion harms "the value of its trademarks as commercial assets".

It cited the game's marketing, in which the word "Rebellion" is in larger text than the rest of the title, or is the only word used to identify the product.

According to the suit, Rebellion owns the trademark for “among other things, ‘entertainment and amusement machines and apparatus, namely, video games and electronic games’”.

The company is seeking an injunction and an unspecified amount of punitive damages.