1,341 Steam keys for “Natural Selection 2” were deactivated by Valve on March 8, as a result of a credit card scam that resulted in Unknown Worlds Entertainment losing $30,000. All the keys were purchased from the developer using stolen credit cards. The real owners of these credit cards made chargeback claims on the fraudulent purchases and, as a result, Unknown Worlds Entertainment never received the money and was hit with the $30,000 cost to recoup the stolen funds.
It appears as though someone purchased the keys through Unknown Worlds Entertainment with these stolen cards (or card numbers), then sold them to third parties at a slight discount and disappeared when the original card holders disputed the charges. As a result of this, Unknown Worlds Entertainment has temporarily closed its store. Steam is now the only place to purchase “Natural Selection 2” at this time.
As of March 8, the individuals who purchased these keys will find their games deactivated. Unknown Worlds Entertainment suggests contacting the site the keys were purchased from .