Good for a published mod. Poor compared to the original. Simply doesn't meet the expectations from the first.
Graphics/Physics: 7 - Nothing new or different from the original other than weapons and enemies which were well concepted. Yay for quality gore though.
Sound: 8 - Somewhat similar to Serious Sam or Duke Nukem sound when it comes to the main character making witty comments. Well done sound quality to both cut-scenes and game-play.
Environment/Maps: 5 - Back tracking in maps to find your goal is very annoying, on the other hand the environment stays true to the original painkiller quality. Somewhat overshadowed or dark on maps.
Game Engine/Scripting: 6 - Too many slow loading screens gets irritating very quickly. Games engine is no different from the original, but it would make sense to have fixed the long loading waits. Much more difficult fighting even on the lower difficulty settings.
Interface: 6.5 - Duel modes for every weapon, unfortunately weapons are no where near as cool and useful as the original painkiller. Boring Menu, cool loading screens though.
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Overall: 6.5 - Good for a published mod. Poor compared to the original. Simply doesn't meet the expectations from the first.