PureSlime

Does a fantastic job at mimicking Doom II, but as a result doesn't deliver as tight of an experience (through no fault of the mappers, that's just the Doom II style). Really recommended if you enjoyed the first one.

Very well-made. It almost seamlessly mimics the style of the first three original episodes, but tweaks the formula to streamline it in certain places and extrapolate upon it in others. A cool look into a sort of "alternate reality" version of Doom. It feels like it spilled over from another timeline where everything was the same, but still a little different.