Call of Duty: Advanced Warfare’s first DLC Havoc is now available for Xbox One and Xbox 360 users – with other platform users to receive it shortly after – and it brings Exo Zombies to the Call of Duty experience. Given the series’ recent forays into Easter Eggs, it only seems fitting that the new Zombies mode should have something similar.

As it turns out, if you discover a key few objects throughout, you’ll unlock a song over the intercom system. Apocalypse Now fans will recognize this as Richard Wagner’s Ride of the Valkyries. It’s an excellent little Easter Egg and certainly accentuates all the accompanying chaos. Check out the above walkthrough video from NoahJ456 to find out how to unlock it.

What are your thoughts on the Havoc DLC thus far? Let us know your thoughts in the comments and stay tuned for more information on Call of Duty: Advanced Warfare in the coming weeks.

Ubisoft’s Watch Dogs is full of secrets and Easter Eggs including some rather disturbing characters that can be revealed using the character profiler and references to the Assassin’s Creed series. Heck, Ubisoft E3 media briefing host Aisha Tyler is also in the game, if you’re crafty enough to find her.

But that’s not all. While hacking into devices, you’ll notice that you can hack into a “Kinekt” device belonging to a gamer. This was spotted by Eurogamer and is an obvious shout-out to privacy concerns that Microsoft’s Kinect raised when it was first revealed that it would be always on and always listening.

Microsoft has made several about-turns in its policy since then, including de-coupling Kinect from the Xbox One altogether and selling the console at $399 from June 9th onwards. What other Easter Eggs have you unearthed in Watch Dogs? Let us know in the comments.