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Provided that you own a very specific, very old device, this is a real thing you can do. The Canon EOS 550D, also known as the Rebel T2i, is an entry-level DSLR Canon that was released back in 2010. While that might seem recent to some — I, personally, cannot comprehend the idea that 2014 was not in fact yesterday — in the tech space, this is ancient history. Recently, developer lauris-nl built a working Doom port for this camera. This might seem out of left field, because it is, but also, running Doom on old hardware is a thing. (There’s an entire subreddit dedicated to it!)

To make this work, lauris-nl used something called “Magic Lantern,” an open-source firmware add-on that initially helped photographers unlock extra shooting features on their Canon cameras. While Magic Lantern likely wasn’t meant to turn the device into a demon-slaying handheld, the software and hardware seem to handle the game fairly well. The camera’s directional pad moves your character around, the Set button fires your weapon, and the Menu and Display buttons open and close Doom’s own in-game menu. It’s wild how intuitively that worked out — but what’s even wilder is that the Canon EOS 550D can also handle sound. The camera has a built-in speaker, so while you’re at your hypothetical event playing Doom on your device, heads up, there will be gunfire and zombie groans. This is, turns out, not exactly a subtle activity. (Although you could turn down the volume if you’re going for undercover gaming while allegedly taking vacation photos.)

John Romero/id Software

If you’re interested in replicating this for yourself and you don’t happen to have a Rebel T2i camera lying around, make sure you filter your eBay searches with precision. This Doom software hack only works on the 550D — and, further, only on the camera running firmware version 1.0.9. Developer lauris-nl included very pointed directions warning people not to attempt Doom installation on any other camera model or firmware. They didn’t include an explanation, but it’s fair to assume that you could risk bricking your very expensive, vintage camera, so it’s probably worth listening to lauris-nl, here.

Not finding a sixteen-year-old Canon either in your junk drawer or online? Don’t lose hope. A separate developer, one DaneBentley, has already figured out how to engineer the same trick on the Canon PowerShot SD1000, a 2007 point-and-shoot that was, like the 550D, minding its own business before someone decided multitasking was in its future. For those curious, playing Doom on a camera isn’t the only feat possible with Magic Lantern experimentation: The same firmware can also, when fiddled around with, do other very cool upgraded actual camera activities, like enhanced video recording and focus peaking. But that, while incredible, is somewhat expected. The fact that “unlock relevant camera features” and “install a 1993 video game” were part of the same software engineering rabbit hole is precisely the Easter egg that I needed to learn about today. And, potentially, include as part of my toolkit for impressing new acquaintances, should I happen across the right camera.