SnapMap is an interesting thing. As with most in-game creation kits, Doom’s map maker is being used to create a range of very strange things, such as a fully functioning farm game because why not?
It’s called Harvest DOOM and it lets you grown crops and raise demons. Its' basically Farmville in hell and you can find it using the code G3KDDG5E.
This is what it looks like in action:
If you want to try it out then this is what you're looking for in the in-game browser:
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