The Alien Stomper from Reebok . (Reebok)

To the delight of "Aliens" fans everywhere, sneaker company Reebok has released an exact replica of the futuristic space shoes worn by iconic action star and feminist screen hero Ellen Ripley (played by Sigourney Weaver). Unfortunately they were only sold in men's sizes. To quote Bill Paxton's Pvt. Hudson, "Game over, man."

Today, April 26, is the 20th Century Fox-dubbed "Alien Day," a nod to the planetoid LV-426, where the xenomorphs were originally discovered by the USCSS Nostromo in Ridley Scott's original "Alien" and would later be the home to the doomed colony of terraformers in James Cameron's "Aliens."

This daylong "Alien"-themed party includes screenings in Los Angeles (at the downtown Ace Hotel) and New York, trivia games and the limited edition "Alien Stomper" shoes.

But the sneakers worn by the alien queen-slaying, gender-busting action hero Ripley were only made in men's sizes. The Alien Stompers were listed as "Mens Classics" on the official site, available in sizes 8 through 12. That means folks with a women's shoe size of 9 and smaller were out of luck.

There were no women's Alien Stompers listed on the site. And a Reebok representative confirmed to the website Gizmodo: “The Alien Stompers were released in men’s sizes due to retail demand.” Only 426 pairs of the limited-edition kicks were sold, and they sold out.

Reebok later updated its original statement to Gizmodo and the website Mary Sue stating the following:

"The Alien Stomper was mis-categorized on our US website as a men’s shoe. While size availability varied by market, the Alien Stomper is a unisex style and was produced in sizes (US Men’s) 3.5 – 12, which is a typical size range for a unisex model."

Perhaps the smaller sizes went early due to the limited nature of the sale. However, we've yet to encounter a size smaller than an 8 being offered online on Ebay, but we'll keep an eye out.

UPDATE

3:54 p.m.: This article has been updated throughout with additional details.

This article was originally published at 1:33 p.m.