One of the weird occasions the expansion is better than the base game, still is doom 3 and feels janky to play but the combat and the arsenal are a lot better, since you finally have powerful combat options that are fun to use like the returning super shotgun or the artifact, which is literally a berserk powerup with bullet time, just badass.

Only thing worse than the original are that many things are pitch black some times, even for doom 3 standards the visibility can be ass.