Blizzard has hidden a playable Duck Hunt Easter egg in Heroes of the Storm.
First reported by Heroes Nexus, this addition is buried in the MOBA's main title screen so long as you have the most recent patch.
Here's how it works: On the Hero Select screen for the Monk, you'll want to keep clicking on the big trees in the background. After tapping the trees a few times a duck will fly out. Shoot it down with your cursor. But be forewarned, your ammo is limited and if you miss with too many shots the duck will fly away. The better you perform, the harder it gets. Oh, and hitting it with one of your first shots awards you extra points. Just like in real life!