Amazon has quietly changed how it sells popular video games to customers with a new policy that allows only Prime members to purchase certain titles directly through the online retailer.

In a quiet update to the website, Grand Theft Auto V on PlayStation 4 and Fallout 4 on Windows PC will only be available to Amazon Prime members for an undetermined amount of time. At the same time, both titles have been discounted from their usual $59.99 price. Fallout 4 is available for $39.99, and Grand Theft Auto V is available for $39.88.

Where the usual checkout button is found on the website, Amazon offers the opportunity to “Try Prime free for 30 Days.” In a statement to Polygon, Amazon says that the deal is only a temporary thing, and those who don’t subscribe to Prime can still purchase the games through third-party retailers.

“From time to time, Amazon offers exclusive selection and pricing on select items for Prime members. Customers who are not Prime members can sign-up for a 30-day free trial of Amazon Prime to benefit from these exclusive prices or they can purchase these items or similar products from third party sellers often fulfilled and shipped by Amazon.”

It’s unknown how often video games will appear behind the Amazon Prime wall. While it seems like a typical method to convince people to try out the service, Amazon is usually wise enough to know that messing with video games like this without advertising would garner backlash. The “gamer” demographic isn’t known for accepting oddities in its hobby without an overly suspicious and protective reaction.

Amazon Prime is available for $99 a year.

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