'xrCore' build 1510, Aug 19 2003 — a demo build of the game S.T.A.L.K.E.R.: Oblivion Lost. It was showcased at Games Convention 2003 (GC 2003), the German TV show GIGA GAMES, and European Computer Trade Show 2003 (ECTS 2003).

Description

Includes 9 levels: Generators, Radar, Dead City, Agroprom, Army Warehouses, Sarcophagus, ai_test_rats_flesh (identical to the version with flesh and rats from xrCore' build 1475, Jul 15 2003), 1mm, level_physic2.

New stalker models were introduced: exoskeleton, leather jacket, and a military stalker in "SKAT-9".

Sections for new anomalies were added: Acid Fog, Witches Jelly, Burnt Fuzz, Rusty hair, and "Dead Zone".

Versions

The build exists in three versions: the first and third differ by certain files; the second is initially non-functional due to the absence of XR_3DA.exe.

General

• First and third versions differ by user.ltx.
• Second and third have unpacked gamedata.
• Second and third include ai_test_rats_flesh.
• Second and third contain screenshots of levels in the screenshots folder.

First version

Intended for press and exhibitions.

• gamedata is packed in gamedata.xp0.
  • Also includes gamedata.xp1 from patch for 'xrCore' build 1482, Jul 22 2003.
• Includes Doc folder with level description, ok and build_gdc.patch0 with backup files, empty screenshots folder, and Logs with dev logs.
• Backup files xrRender_R1.dll and xrGame.dll in root.
• No ai_test_rats_flesh.
• Includes demo1.cycle.
• Contains server file 1111 comparing user.ltx with an unknown earlier build.
• XR_3DA.exe has altered modified date (Oct 3, 2003) but creation date Aug 20, 2003.
• Updated xrGame.dll (from second version of Build 1511).

Second version

Backup build.

• Has ai_test_rats_flesh but no bat file for launch.
• Missing XR_3DA.exe.

Third version

Built from second, for unknown recipients.

• Includes bat file for ai_test_rats_flesh.
• New files !!!README!!!.txt and user_fix.ltx.
• XR_3DA.exe modified date Jan 4, 2009 (creation Aug 20, 2003). Differs by one character from first version.
• DLLs updated to first version of Build 1511.

Levels

Generators

Skybox and lighting updated. More vegetation added, geometry fixes applied.

Radar

Features antennas and surroundings. Contains flesh and blind dog idol models, plus a Niva at player spawn.

Dead City

Lake at northern edge removed. Vehicles (Niva, KamAZ-5320) added, NPCs removed.

Agroprom Institute

Only factory with modified courtyard avaliable. Comes in two versions:

• present_level_flesh — with rats, flesh, and anomalies.
• present_level2 — with stalkers.

Archive bonus.rar/koan contains present_level2.rar with level.spawn and level.game for stalker version.

Army Warehouses

Includes military base, power lines, and checkpoints. Features KamAZ and Niva, stalkers without AI, and flesh idols.

Sarcophagus

One floor with corridors and rooms. Contains flesh, blind dogs, bloodsucker, stalker idols, plus non-AI stalker NPCs.

1mm

Large test map with roads, bridges, ramps. Used for vehicle testing. Niva, KamAZ, and non-AI stalkers present.

level_physic2

Test level for ragdoll physics. Populated with non-AI stalkers.

Gameplay

Weapons available: TOZ-34, AK74, LR300, FN2000, Vintorez, VAL, RPG7, F1, RGD5. Enemies include stalkers, flesh, and rats. The "Mosquito Bald Spot" anomaly appears. When stalkers shoot at the player, the player is slightly knocked back. Rats can now be eaten.

New weapon and mutant damage types were introduced:

Damage type	Meaning
wound	Damage from piercing/rupture
strike	Damage from blunt impact
burn	Damage from heat/thermal
shock	Damage from electricity
radiation	Damage from radioactive exposure
telepatic	Damage from telepathic influence

NPCs and the player gained parameters affecting condition:

Parameter	Explanation
Condition parameters
satiety_v	Rate of satiety decrease over time
radiation_v	Rate of radiation decrease
satiety_power_v	Power increase when sated
satiety_health_v	Health increase when sated
satiety_critical	Critical satiety threshold where health decreases
radiation_health_v	Health loss from radiation
bleeding_v	Blood loss at maximum wound
wound_incarnation_v	Wound healing rate
health_hit_part	Percent of damage affecting health
power_hit_part	Percent of damage affecting stamina
Immunity coefficients
burn_immunity	Immunity to heat damage
strike_immunity	Immunity to blunt damage
shock_immunity	Immunity to electric damage
wound_immunity	Immunity to piercing damage
radiation_immunity	Immunity to radiation
telepatic_immunity	Immunity to telepathic influence
Sleep-related change rates
sleep_health	Health change rate during sleep
sleep_power	Stamina change rate during sleep
sleep_satiety	Satiety change rate during sleep
sleep_radiation	Radiation change rate during sleep

Vehicles

Car doors and trunk can now be opened. Engine must be started manually. First-person camera rotation inside cars was added. Vehicle parameter display removed.

Inventory

UI graphic elements were added. All items gained icons, but most are temporary placeholders and don’t match models. Clicking an item icon shows a small 3D rotating model of the item, alternating clockwise and counterclockwise (slowing before switching).

New status bars: health (red), satiety (yellow), stamina (green), radiation (blue). The player can now sleep for set times via inventory, affecting only status (health, satiety, stamina, radiation). Temporary buttons were added: Food (satiety), Medkit (health), Antirad (radiation).

Right-clicking an item opens a context menu with: Drop, Eat^{[note 1]}, Activate.

Inventory capacity changes:

• Backpack slots increased to 56
• Belt slots increased to 18

HUD

Health bar redesigned: now a horizontal red bar (instead of vertical color-changing lines) and moved to the top right next to the minimap. Minimap always displays the Agroprom map regardless of level. New weapon panel shows only weapon name. Radiation or blood loss values display on screen when thresholds are reached.

PDA

The PDA appeared for the first time as a UI element. Functionally unfinished: opened with "T", allows typing text but no other features.

Shortcomings

1. Killing stalkers with the models stalker_svoboda2.ogf, stalker_svoboda4.ogf and stalker_black_mask.ogf causes a crash.
2. Without disabling the mt_physics parameter, levels such as: Generators, Dead City, Agroprom Institute, Sarcophagus are not functional.
3. The level ai_test_rats_flesh cannot be launched due to missing Skybox textures (sky_l1escape1_bk.dds, sky_l1escape1_fr.dds, sky_l1escape1_if.dds, sky_l1escape1_rt.dds, sky_l1escape1_up.dds).
4. After picking up the detector, when attempting to open the inventory, the build crashes due to the missing texture ui_inv_binoculars.

Features

• Expanded functionality of the A-Life system:
  • added a limit on the maximum number of NPC collisions in offline mode (default 10);
  • new patterns appeared for online mode, their format changed from .dat to .efd;
  • stalkers received new "goals" (healing, sending SOS signals, responding to SOS signals, and others)^{[source 1]};
  • online-mode distance increased to 170 meters.
• New commands ph_fps and ph_iterations were introduced: the first controls the speed of coordinate updates, the second — the number of iterations for dynamics calculations.
• A new pixel shader r1_model_env.ps appeared, designed for more realistic lighting of dynamic models using cube maps.

History

Built on August 19, 2003. The next day, an update was compiled: 'xrCore' build 1511, Aug 20 2003.

First version

2003

The initial build was compiled into the folder build_gdc^{[note 2]} for presentation at Games Convention 2003. The next day (August 20) the build was updated to 1511 and taken to the exhibition. On the same day, the build folder on company servers was moved to !!!OLD_BUILDS!!!, as noted in the mdmp-file of Alexey Sityanov from August 20, 2003 (13:40).

After the exhibition, on August 24, the build was taken to the German TV show GIGA GAMES. Six and a half hours before the broadcast, an article dedicated to the build was published^{[link 1]}. During the recording, PR-manager Oleg Yavorsky demonstrated the build to journalists by playing it. At 22:00 the episode aired on NBC Europe.

On August 27, the build was shown at ECTS. During the exhibition, GenGamers and Gamespot websites published^{[link 2][link 3]} several screenshots, sent to them by THQ.

On September 5, a preliminary review of S.T.A.L.K.E.R.: Oblivion Lost was published on Krawall^{[link 4]}, with two attached screenshots from the "Basement" and Army Warehouses levels.

On September 20, Gamekult published a review^{[link 5]}, with screenshots of the Generators and "Basement" levels from this build.

During its demonstration at exhibitions and to journalists, the build was also used for work purposes, as seen from new files whose dates did not match the build’s compilation, or from files that were deleted or overwritten (the appearance of gamedata.xp1 from 'xrCore' build 1482, Jul 22 2003 in late September and the file 1111 in early October).

On November 13, the Gamespot website published^{[link 6]} 4 videos with demo flyovers of the Generators, Basement, Radar, and Army Warehouses, along with a large number of screenshots (some of which look similar to each other).

On December 16, "Strana Igr" published a magazine with 2 screenshots of the “Army Warehouses” level.

On December 18, the Gamespot website published^{[link 7]} 6 screenshots of the "Sarcophagus" level.

2004

On April 26, the June issue of "PC Games" magazine was released^{[link 8]}. There was a preview of S.T.A.L.K.E.R.: Oblivion Lost on the DVD, featuring an interview with Oleg Yavorsky and demonstrations of several builds, including 'xrCore' build 1510, Aug 19 2003, which was used to demonstrate the Dead City level.

On July 9, the GenGamers website published^{[link 9]} 2 screenshots from the "Generators" and "Army Warehouses" levels.

2005

On August 24, parts of build_gdc were split into several archives (arc1.tar, arc2.tar and arc3.tar) and subsequently stored on GSC’s servers in the koan folder.

2006

On May 16, build_gdc was packed into the archive STK2K3.7z.

2008

In December 2008, Loxotron downloaded the koan folder from the company server and archived it on January 4, 2009. The altered timestamps of the archives and files indicate the archiving.

2021

On April 20, 2021, Zone Chronicles VK group published^{[link 10]} the STK2K3.7z archive. Along with already known builds, this version was also included.

On April 24, 2021, Loxotron uploaded to the GAMEINATOR forums the archive bonus.rar. Inside, along with various documentation from 2008–2010, the decompressed koan folder contained the split-archive parts of build_gdc.

Second version

2003

In case of problems with the build after the update to Build 1511, a backup folder build_gdc_copy was created, containing the original 1510. This archive was used for work purposes until October 3, 2003, when Andrey Prokhorov took several screenshots, saved in the screenshots folder.

By September, the build folder was stored on GSC Game World’s servers in the !!!OLD_BUILDS!!! folder, as noted in Alexey Sityanov’s mdmp-file from September 19, 2003 (12:38).

2006

On May 16, the build_gdc_copy folder was packed into the STK2K3.7z archive. At the time of archiving, the build lacked the XR_3DA.exe, presumably because the original executable was stored separately. This is supported by the fact that the Build 1511 executable was also stored separately from its updates, as indicated by altered modification dates.

The existence of the original 1510 executable is further confirmed by:

• the creation dates of executables from the first and third versions (August 20, while 1510 was compiled on August 19);
• logs from Oles Shishkovtsov dated August 19 in the logs folder;
• the incompatibility of the Build 1511 executable with a clean 1510 build^{[note 3]}.

2021

On April 20, 2021, in the VK group Zone Chronicles (now S.T.A.L.K.E.R. Wiki: Zone Chronicles), then-admin Vector Infamous published the STK2K3.7z archive. Along with already known builds, this version was also included.

Third version

2008

In 2008, GSC Game World provided the build, presumably, to the Dezowave team, who began developing the Lost Alpha modification. This is indirectly indicated by the signature in the !!!README!!!.txt file:

!!!!PRIVATE USE ONLY!!!!

---

GSC GAME WORLD 2003

Specifically for Dezowave, an archive build_gdc_2003 was created from build_gdc_copy. It included the build with the Build 1511 update installed, the missing XR_3DA.exe file, and new files in the archive root (!!!README!!!.txt and user_fix.ltx).

In December 2008, Loxotron downloaded the build from GSC servers and archived it on April 26, 2009.

2009

On August 5 (15:41), Loxotron, under his alternate account <God>, created a topic^{[link 11]} titled S.T.A.L.K.E.R. build 1510/1511, Aug 19 2003, posting three screenshots and a comment:

As expected, the community is pitiful and useless, you did nothing and didn’t even really try, but fine, I’ll bless you with what survived on an old hard drive
<...>
By 22:00 there will be a link^{[original 1]}

<God>

Two hours and 16 minutes later, in the comments, user Ago 2 (aka Le Raux) posted a download link to the build with the comment:

Eeeh, what the hell?!! We agreed that today I would upload it!!
You bastard!!11^{[original 2]}

Ago 2

Some time later, the original text of <God>’s message, except for the screenshots, was erased and replaced with GDC AUG 2003 DEMO.

In addition to the build, Ago 2 also uploaded an archive update.rar, which was a repack of build_gdc.patch1 from arc5.tar, with different contents.

How to play

1. Extract the folder with the build from the archive.
2. Install updates up to Build 1511.
   1. Install any of the updates up to Build 1511 (applies to the second version of 1510).
   2. Optionally install the update to the second version of Build 1511 (applies to the third version of 1510).
3. Copy XR_3DA.exe^{[note 4]} and paste into the root folder of the build (applies to the second version of 1510).

• "present_demo.bat" — demo flythrough of the Generators location
• "present_demo1.bat" — duplicate of "present_demo.bat", but uses "demo1.cycle" instead of "demo.cycle" (present only in the first version)
• "present_demoA.bat" — duplicate of "present_demo.bat", but uses "demo.anm" from the level folder instead of "demo.cycle"
• "present_demoB.bat" — demo flythrough of the Sarcophagus
• "present_demoC.bat" — demo flythrough of the Radar
• "present_demoD.bat" — demo flythrough of the Army Warehouses
• "present_level_ai_test_rats_flesh.bat" — level ai_test_rats_flesh (present only in the third version)
• "present_level_deadcity.bat" — Dead City level
• "present_level_generators.bat" — Generators level
• "present_level_military.bat" — Army Warehouses level
• "present_level_physic.bat" — level_physic2
• "present_level_podval.bat" — Sarcophagus level
• "present_level_radar.bat" — Radar level
• "present_level_rats_flesh_anomaly.bat" — Agroprom Institute level, version with rats, flesh, and anomalies
• "present_level_stalkers.bat" — Agroprom Institute level, version with stalkers
• "present_level_vehicles.bat" — 1mm level

Guides and modifications

Increasing stability

To increase build stability, set the parameter mt_physics from on to off in "user.ltx". If the third version is installed, you can replace the original "user.ltx" with "user_fix.ltx" from the same archive.

Launching ai_test_rats_flesh on the second version

1. Install a fix or copy the textures "sky_l1escape1_bk.dds", "sky_l1escape1_fr.dds", "sky_l1escape1_if.dds", "sky_l1escape1_rt.dds", "sky_l1escape1_up.dds" from nearby builds.
2. Copy the bat-file "present_level_ai_test_rats_flesh.bat" from the third build version or create a bat-file with the following content:
   • @xr_3da.exe -external -start server(ai_test_rats_flesh/single) client(localhost)

Fix

Fixes most crashes related to models and textures.

• Link

Gallery

ECTS Screenshots

Krawall screenshots

Gamekult screenshots

Strana Igr screnshots

Gamespot screenshots

GenGamers screenshots

Videos

GIGA GAMES videos

Gamespot videos

PC Games videos

Notes

Original messages in Russian:

Notes:

Links:

Source: