The company's malware team this week put out a stark warning about a bogus Apple Mac space invaders game that deletes files from the host system's hard drive as the price of zapping aliens.

Branding the deadly game as malware and giving it the name OSX.Loosemaque, the company has even gone to the bother of posting a video of the game's behaviour on YouTube. In the demonstration, playing the game is clearly shown to delete files from the Mac user's home folder, starting with doc files and moving on to preference files. Each alien killed in the game destroys a single file.

"The game is actually mildly challenging though I wouldn't recommend doing this on your home computer," voices the Symantec analyst.

Research reveals that the 'Trojan' is actually a well-intentioned art project called 'Lose/Lose' designed to raise philosophical questions about the nature of video games and killing. Its creator is believed to be one Zach Gage, who released the program as part of an online art project in September.

"By way of exploring what it means to kill in a video-game, Lose/Lose broaches bigger questions. As technology grows, our understanding of it diminishes, yet, at the same time, it becomes increasingly important in our lives," announces Gage, on his website.

The game also clearly states the consequences of playing it, at least as far as English-speaking users are concerned. "Killing in Lose/Lose will likely result in files on your hard drive being deleted," says the opening screen. "You have been warned."

Getting the file on to a Mac would also require a deliberate act as it is not distributed using any subterfuge.

However, in Symantec's view creating such a game is an invitation for criminals to use it for their own purposes.

"While the author of OSX.Loosemaque actually informs people on his website that the game deletes files, there's nothing stopping someone with more malicious intentions from modifying it and passing it on to unsuspecting users who don't have security software installed," says Symantec's Ben Nahorney in a blog.

Is Symantec over-reacting? Releasing the game on the Mac reduces its possible use to a small portion of the computing world. In the US Macs are barely 7 percent of PC users, with reducing percentages elsewhere. Mac gaming of any sort, retro or not, is also a tiny niche.Security expert, Graham Cluley of Sophos, was less convinced that it deserved Symantec's opprobrium.