Doom was action and Doom 3 try to be a horror game. But it does not work as everything is so predictable that one almost fall asleep. Every monsters stands where you think it will and the only horror is when you walk to the next level and see that it is the same sci-fi labs environment as the last one. There are max three monsters at once and the first time you meet a new monster they break the flow with a worthless cut-scene to show it off. Doom I and II are great games and Doom 3 does not deserve to use the same name.
Here I write what I think about the games I have played. The score is shown as a smiley before the title of the game.
Note about Movies: None of the Youtube movies that i link to are made by me and i include them only to give you a chance to see what the game looks like. Only the text and the smiley score act as my review of the game .