Amazon adds 3 big free Prime Day video games, including 'Suicide Squad.' How to claim them.

For 48 hours, Amazon Prime members can claim a trio of free games, including 'Suicide Squad: Kill the Justice League.'

Amazon Prime Day isn't just about buying physical products. You can also get PC games for free, too.

That part isn't new, as Amazon has offered a bundle of free video games leading up to Prime Day through its Prime Gaming promotion since late June. With the exact dates of Prime Day coming up this week, though, Amazon is expanding the list with three popular or otherwise noteworthy video games:

• Suicide Squad: Kill the Justice League

• Chivalry 2

• Rise of the Tomb Raider

Amazon Prime subscribers will have 48 hours to claim these three games, starting July 16 at 3 a.m. ET. To claim them, arm yourself with an Amazon Prime login, take it to the Prime Gaming website, log in, and follow the on-screen instructions.

While it isn't horribly surprising to see Rise of the Tomb Raider (which launched in 2015) or Chivalry 2 (which was recently free on Epic Games Store) on this list, Suicide Squad stands out. It's a very recently released big-budget game with a big-name license behind it. Kill the Justice League has notably been a financial failure for Warner Bros., but to see it hit the proverbial bargain bin this soon is astonishing.

But hey, anything is worth trying for the price of free.