Leaks have been major news in recent months. The biggest leak was the hacking incident at Rockstar that released ninety minutes of pre-alpha footage for the upcoming game.
Blizzard also experienced a leak for the upcoming Diablo 4. In an earlier alpha test, an hour of gameplay was shared via a Discord chat group. The video found its way onto Reddit and it spread like wildfire. Blizzard has recently started its closed beta test for Diablo 4 and players have received invites for it. Those invited into the beta test will need to sign a Non-Disclosure Agreement as part of the deal. This means that any gameplay information should be kept confidential and can't be shared with anyone.
However, the NDA has not prevented testers from leaking information for Diablo 4. We also managed to find several of the leaked videos that have been circulating online. Invite and gameplay information leaked Players have been discussing the closed beta for Diablo 4 on Reddit.