Removed scenes & concept art from various games...

[retroborg]

I always wondered why the following concept art never made it in the following games, as they looked very cool:

Half Life 2
I remember when I 1st saw this scene, I thought it would have been quite tough & challenging to fight and avoid these Hydra creatures.
I wish they had made it in the final version of Half Life 2.
http://img222.imageshack.us/img222/1572/hl2hydra.jpg


Unreal 2
This scene were the marine is performing a space walk on an asteroid belt around a Red Giant Star is so cool! It’s a real pity they never included this stage in the final version of Unreal 2.
http://img22.imageshack.us/img22/1059/unreal23.jpg

And is this a Boss of some kind, frying the Skaarj warrior just before fighting you?
http://img718.imageshack.us/img718/1507/unreal24.jpg

And what is this jelly-fish alien thing? They would have looked great in a water stage, but as far as I remember, there was no true water world in Unreal 2. So where were these aliens supposed to have appeared in the 1st place?
http://img6.imageshack.us/img6/9060/unreal22.jpg

http://img694.imageshack.us/img694/6867/unreal21.jpg

And did a smaller version of this appear in the final final game? It looks a bit silly imo.
http://img190.imageshack.us/img190/9877/unreal25.jpg


Doom 3
There were various scenes removed from the final version of the game, for example:
I don’t remember this scene with the pinky demon immerging from the fiery inferno.
http://img684.imageshack.us/img684/2691/doom307.jpg

http://img406.imageshack.us/img406/5240/doom306.jpg

Also did these guys actually appear in Doom3? I only remember them in the Expansion pack “Doom III - Resurrection of Evil”
http://img338.imageshack.us/img338/8443/doom311.jpg

And these scenes in the Hell stage of Doom3?
http://img179.imageshack.us/img179/1252/doom303.jpg

http://img199.imageshack.us/img199/1306/doom304.jpg
http://img641.imageshack.us/img641/2263/doom305.jpg

What is this bird-demon dude?
http://img72.imageshack.us/img72/4060/doom309.jpg

http://img32.imageshack.us/img32/8500/doom310.jpg

What ever happened to the Spider Master mind Boss & the lost souls?
http://img202.imageshack.us/img202/1218/doom302.jpg

http://img684.imageshack.us/img684/6403/doom301.jpg

And finally, I never understood why they removed the infamous “bathroom scene”?!
http://img232.imageshack.us/img232/2095/doom308.jpg


Prey
I have completed Prey, but I don’t remember any of these guys? Please, correct me if I’m wrong …
http://img571.imageshack.us/img571/1237/prey1.jpg

http://img171.imageshack.us/img171/2744/prey2.jpg

http://img29.imageshack.us/img29/2033/prey3.jpg

http://img191.imageshack.us/img191/153/prey4.jpg

http://img442.imageshack.us/img442/9697/prey5.jpg

http://img256.imageshack.us/img256/5117/prey6.jpg


Quake 4
Over all I thought Quake 4 sucked, but it’s a real pity they never included these scenes in the final game:
This would have been an awesome boss. Just look at the batteries in the back, they’re actually tormented marines! That is so cool, in a sadistic, sick kind of way!
http://img100.imageshack.us/img100/6397/quake42.jpg

I think these guys made it in the final game, but they removed the 2 torso batteries from the bottom. Pity…
http://img202.imageshack.us/img202/544/quake45.jpg

This Strogg-Tiger think, looks so fierce!
http://img202.imageshack.us/img202/2776/quake44.jpg

The dispersal plant in the final game looked nothing as revolting or sick as this. Pity they didn’t do it like this in the final.
http://img301.imageshack.us/img301/6375/quake47.jpg

What is this mech?
http://img208.imageshack.us/img208/3255/quake46.jpg

Lol! This chap looks so miserable! I wonder what he was replaced by?...
http://img29.imageshack.us/img29/4805/quake41.jpg

This platform looks awesome. It would have been cool seeing this in motion.
http://img704.imageshack.us/img704/7128/quake43.jpg

So, any thoughts, opinions or answers concerning my queries, will be highly appreciated.
Also if any of you people have any more scenes or concept that didn’t make it in these games or others, feel free to post them here.

[yoda313]

I'm sure its the same reason scenes are deleted or never finished for movies. Probably most often its money. Usually too expensive to add one more thing to the game. Or time constraints. They have to rush the release to get it into the stores on a schedule.

I think with the increasing use of downloadable content that may not be as much of a concern anymore. Just like special editions and bonus discs for movies these are like second chances for games. Left off a cool boss level? Add it to the dlc!