One of the better entries in the series. Has some expansive spaces for a change and the overkill is toned down for a more enjoyable experience. Probably has way too much plasma for most, but I like that.
Rest of this series rate a consistent 4 - but this is a real let down after playing them. Annoying, confusing and goes overboard with the archviles and lost souls, especially without any heavy weapons. I just abandoned it after several minutes. Shame.
If your idea of fun is mindlessly chaingunning a 100 low level monsters in large bland, featureless, randomly slapped together rooms, this is for you. I gave up in utter boredom 2 minutes into map 2. Truly awful.