The Epic Games Store just kicked off its annual Mega Sale in a very big way: The store surprised Epic users this week by offering Grand Theft Auto 5 as its next free game, available now until May 21. The surprise giveaway marked the beginning of a full month of game deals and weekly giveaways at the Epic Games Store in what is essentially Epic's version of Steam's Summer Sale. Unfortunately, the Epic Games Store is having loading issues today due to a large number of people coming to the site to claim GTA 5.

The Epic Mega Sale includes four weeks of game deals, and a new free game will be given away every Thursday. Normally, we know what next week's freebie will be, but during the sale, Epic is keeping each week's free game a mystery. We're keeping track of every Epic free game (past and current), so check out our guide for more info.

Of course, the Mega Sale is bringing a slew of discounts on Epic's biggest games, including Control for $30, Borderlands 3 for $30, and Red Dead Redemption 2 for $48. Once the site is loading properly again, we'll be able to highlight more of the best game discounts here.