AI


The X-ray engine uses GSC Gameworld's proprietary ALife artificial intelligence engine. ALife supports more than one thousand characters inhabiting the Zone. These characters are non-scripted, meaning that AI life can be developed even when not in contact with the player.

The NPCs have a full life cycle (task accomplishment, combat, rest, feeding and sleep) and the same applies to the many monsters living in the Zone (hunting, attacking Stalkers and other monsters, resting, eating, sleeping). These monsters will migrate in large groups. The non-scripted nature of the characters means that there are an unlimited number of random quests. For instance, rescuing Stalkers from danger, destroying Stalker renegades, protecting or attacking Stalker camps or searching for treasure. The AI characters travel around the entire zone as they see fit.

Numerous tactics can be employed to complete the game, such as rushing or using stealth and sniping. The NPCs will react in a different way to each of them. S.T.A.L.K.E.R.'s NPCs plan ahead by "Goal-Oriented Action Planning" in order to achieve this.

Bullet physics


S.T.A.L.K.E.R. uses "realistic" bullet physics, similar in nature to tactical shooters such as Ghost Recon Advanced Warfighter or Operation Flashpoint. Bullets are affected by gravity, bounced against solid surfaces at oblique angles, and firearms are highly inaccurate when fired without aiming. To score consistent hits at medium or long range, players must aim using the iron sights
on their guns. Additionally, hit damage is pseudo-realistic, and the player can die after only being shot a few times (although later in the game various armor suits and artifacts can be acquired that increase the player's resistance to damage). Late-game depends heavily on scoped weaponry due to the well-armed and powerful enemies that keep their distance from the player.

Physics


S.T.A.L.K.E.R. uses a heavily modified version of the ODE physics engine, supporting hundreds of physics objects on different levels. Ragdoll physics, destructible objects, realistic bullet ballistics and skeletal animation can all be found in the game.

Weather


A weather system is integrated into various parts of the landscape and allows a variety of weather effects, such as sunshine, storms and showers. The weapons available, behavior of the AI, game tactics and ranking systems will depend on the weather.

For more direct specifications, check the engine's homepage.

Image RSS Feed Latest Screens
Fun Fun Fun
Blog RSS Feed Post news Report abuse Related News: STALKER Clear Sky music... and more.

About S.T.A.L.K.E.R.: Clear Sky with 3 comments by Sclera on Mar 29th, 2011

Allow me to direct your attention to three mods I have recently completed:

1. Clear Sky Music Overhaul


After a few weeks of work and minimal trouble, it's all done. Most of the game's original music has been discarded, since a lot of it was borrowed from Shadow of Chernobyl. Limansk, The Hospital and CNPP remain untouched, but everywhere else gets a bunch of new music. About 59 minutes of music were composed, and (perhaps hypocritically) I borrowed some music from my Shadow of Chernobyl mod as well.

Video preview:



2. Anomaly Sound Replacement for Shadow of Chernobyl


Borne not out of an apparent need for new sounds, but purely out of creative boredom, this mod replaces the most commonly heard anomaly sounds in the game. It gives the game a fresh feel without ruining the intended atmosphere. Also, if you are a mod developer and wish to include these in your mod, please do so, and let me know of course.

Video preview:


3. Interface Mod for Shadow of Chernobyl

I never intended to release this, initially. It started out as a lot of different things I was changing for myself, and ended up being a culmination of these things in a neat little package. The idea of the visual aspect of this mod was to eliminate most of the clutter on-screen, and remove superfluous or immersion-breaking information. On the gameplay screen you can see your health, stamina, current ammo and fire-mode; no, there's no map. That's how I like it (try not to feel tempted to check your Contacts for nearby enemies... I swear I don't do it).

You're given several options here; 2 health bars, 3 cursors, 4 PDAs, and 3 sets of PDA sounds. Don't be overwhelmed though, defaults are installed.

Thanks for reading. Please enjoy my work! Your thoughts are appreciated.

- Rohan

Add game Games
S.T.A.L.K.E.R. Shadow of Chernobyl
S.T.A.L.K.E.R. Shadow of Chernobyl

S.T.A.L.K.E.R. Shadow of Chernobyl

Updated 4 days ago Released 2007 Single & Multiplayer First Person Shooter

In 1986, the world's worst nuclear disaster occurred at the Chernobyl power station. Soviet authorities established a 30km 'Exclusion Zone' around this...

S.T.A.L.K.E.R.: Call of Pripyat
S.T.A.L.K.E.R.: Call of Pripyat

S.T.A.L.K.E.R.: Call of Pripyat

Updated 1 month ago Released 2010 Single Player First Person Shooter

Call of Pripyat takes you once again into the vicinity of the Chernobyl nuclear reactor that exploded in 1986. This so-called "Zone" is a highly contaminated...

S.T.A.L.K.E.R.: Clear Sky
S.T.A.L.K.E.R.: Clear Sky

S.T.A.L.K.E.R.: Clear Sky

Updated 1 month ago Released 2008 Single Player First Person Shooter

A group of stalkers, for the first time, reaches the very heart of the Zone-the Chernobyl Nuclear Power Plant-and triggers a cataclysm on the brink of...

S.T.A.L.K.E.R. Build 1935
S.T.A.L.K.E.R. Build 1935

S.T.A.L.K.E.R. Build 1935

Updated 10 months ago Released 2004 Single Player First Person Shooter

This is build 1935 of S.T.A.L.K.E.R. Shadow of Chernobyl, formally called S.T.A.L.K.E.R. Oblivion Lost. This was made by GSC Game World before they remade...

S.T.A.L.K.E.R: Oblivion Lost
S.T.A.L.K.E.R: Oblivion Lost

S.T.A.L.K.E.R: Oblivion Lost

Updated 4 years ago Released 2002 Single Player First Person Shooter

Ones of the first concepts of S.T.A.L.K.E.R Shadow of Chernobyl.

Post comment Comments  (20 - 30 of 65)
ice_trey
ice_trey Jun 19 2011 buried:

(buried)

worst engine ever, unnecessary ugly, nonoptimizzed , crashfriendly like nothing before, avoid if your a SERIOUS game/modder/developer

-7 votes     reply to comment
λpone
λpone Mar 2 2012 replied:

This man is on drugs don't listen to him

+3 votes     reply to comment
Rolfisalinas
Rolfisalinas Aug 13 2011 replied:

"crashfriendly like nothing before", i'm asuming you havent played fallout 3 or new vegas. I gave this engine thousand of hours ussing it and it only crashed a few times when i moded my game

+2 votes     reply to comment
Opinionator
Opinionator Aug 24 2013 replied:

WTF?

+1 vote     reply to comment
nocturni
nocturni Oct 24 2011 replied:

Uh. Fallout 3 uses Gamebryo. Not X-ray. You are mistaken.

+3 votes     reply to comment
Rolfisalinas
Rolfisalinas Aug 13 2011 replied:

"crashfriendly like nothing before", i'm asuming you havent played fallout 3 or new vegas. I gave this engine thousand of hours ussing it and it only crashed a few times when i moded my game

-2 votes     reply to comment
Derranged
Derranged Jun 29 2011 replied:

OK, I want to see you create an engine as good as this one?

+1 vote     reply to comment
Sotoku
Sotoku Apr 22 2011 says:

I recently tried to replay my fully patched retail clear sky again, but when I try to run it, it says xrengine crashed.

Should I download the latest version to see if it helps?

+1 vote     reply to comment
Aggregate
Aggregate Apr 12 2011 says:

Wait, what? There's going to be a STALKER 2?

Best. News. Ever.

+5 votes     reply to comment
Sebo_hasee
Sebo_hasee Mar 28 2011 says:

is it right that this engine has some codes from the source engine ?

0 votes     reply to comment
Post a Comment
click to sign in

You are not logged in, your comment will be anonymous unless you join the community today (totally free - or sign in with your social account on the right) which we encourage all contributors to do.

2000 characters limit; HTML formatting and smileys are not supported - text only

Platform
Windows
Company
GSC Game World
Contact
Send Message
Official Page
Stalker-game.com
Licence
Commercial
Release Date
Released 2007
Engine Watch
Track this engine
Share
Community Rating

Average

8.3

146 votes submitted.

You Say

-

Ratings closed.

Highest Rated (4 agree) 10/10

sex

Mar 23 2011 by .sverek

Embed Buttons

Promote X-Ray Engine on your homepage or blog by selecting a button and using the embed code provided (more).

X-Ray Engine X-Ray Engine
X-Ray Engine
Statistics
Rank
15 of 730
Last Update
5 months ago
Watchers
168 members
Games
5
Files
83
News
7
Tutorials
6
Reviews
11