Having played every single Quake game there is (including the add-ons), I can safely say I am a Quake Expert. I love Quake. I love every single Quake game that has been made...
Except this one.
I have been fair, but the cons out weigh the pros. Badly.
Story - The story was simple like the first 2 Quakes: Kill or be killed. Destroy the Strogg's Boss. Easy.
You'd think it would better when your character gets changed into one of the Strogg...
until you realize you can't jump higher, shoot faster, or do anything special besides listening in on Strogg conversation...
and you're orange.
And you look like an idiot.
Really! Your character is now one of the ugliest in the galaxy.
Enemy - The AI was OK. Sometimes the enemy would attack from behind, above or below, but only in the first part of the game, near the end it got rather repetitive.
Two other things that bothered me was that all the bodies disappear right after I killed them and all the enemy were the same color, making them hard to tell apart. (Except for the guys that looked like my orange character. Great, now I have to look their ugly faces too)
Weapons - All the weapons are weaker and you have to reload them, unlike the other Quakes where you could shoot as fast as you could click the mouse and take out armies with your shotgun. Major bummer.
Levels - All of the Levels were poorly lit, making it more of a challenge and giving the enemy cover in the shadows (BTW, you couldn't see them in the dark. But they could clearly see you when you were in the dark).
Oh my goodness! You'd think the Strogg would have at least one well lit room... but noooo, they like the poorly lit rooms and hallways. Maybe it's so they don't have to see your ugly character.
None of the levels bear the slightest resemblance to the levels of the previous Quakes... now don't get me wrong, having the exact same levels or ones that look TOO similar is not genius... it's laziness.
That being said, the rooms, corridors and hallways were all to small and tightly compacted. Not as open as Quake 1 or 2.
They even added needless things like rails on stairs, pipes and other junk that hinder your movement.
Vehicles - What the heck? If you are going to add vehicles into the game, a least add good ones. Every single vehicle in Quake 4 was a flop. The entire vehicle driving part should of been left out.
Multiplayer - I don't play multiplayer on games I don't like... soooo nothing here.