The age-old question of what the limit is in terms of ways Doom can be ported is still being tested, as one fan has taken it upon themselves to make the iconic FPS playable on a keyring-sized gaming system. With id Software said to be working on a new project, many will be speculating whether the studio will be once again bringing the world more exploits of the Doom Slayer. Perhaps the developer is looking to bring back Quake or maybe work on something different. However, there's no way of knowing just yet.In the meantime, fans are still in love with what is largely considered the most influential first-person shooter in gaming history. But it doesn't end with people just playing the game as intended. There have been so many wild devices that Doom has been made playable on that it seems as though the 1993 classic can run on just about any machine that's put before it. Everything from smartwatches to treadmills to a John Deere tractor and even a version running in Minecraft have proven just how versatile the game is.RELATED: Doom Player Gets the Iconic id Game to Run on a Google Smart ClockNow another person is putting this versatility to the test. In a post on Twitter, user SunnyChow uploaded a brief clip of Doom running on what appears to be a very small Game Boy-like system. In fact, it's even tinier than that, as the user's thumbs eclipse the micro device. When asked by others what the game is actually running on, SunnyChow says they've ported it to a Thumby, which is described on the manufacturer's website as an "itty-bitty game system" that has obviously taken cues from Nintendo's retro handheld console. The user on Twitter says this particular device has a web-based editor and an emulator, which has allowed them to code Doom onto it.

Over the years, id's release has seen a slew of iterations. There have been mods aplenty and, as in this example, many fans who have attempted to run the game on something that's not a standard PC. When Doom first released, not only did it become instrumental in helping to shape the FPS genre, but it also pioneered early online multiplayer at a time when that was much less commonplace, and this legacy is still felt today.

It's hard to believe that Doom will be turning 30 this year, as will some of its contemporaries like Mortal Kombat 2, Star Fox, and The Legend Of Zelda: Link's Awakening. Despite its age, people have by no means forgotten about this iconic shooter, and no doubt many will continue to mod and port it.

Doom was released in 1993 and is available on multiple platforms.

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Source: Tiny Circuits