Okay, so you're probably wondering why we're talking about Halo 3 almost seven years after it originally released. That's natural, it's essentially a lifetime in the world of tech and video games. Well, here's the deal: Halo 3's developers at Bungie were super-keen on tucking all manner of secrets away within the game and apparently the final one has only just been found. As Beyond Entertainment tells it, a few members of the Halo YouTube community have been following the breadcrumb trail of clues that Bungie's been leaving for the past few years, and this Easter egg is a bit more personal than monkey people hidden in the game's opening jungle level. In fact, it's a birthday message for former senior-engineer Adrien Perez's wife.