The stalker 2 SDK leak was a big deal. The old Stalker 2 concept was wild.

2011 Stalker 2 leak. A trip back in time to when the entire Stalker 2 including SDK and source code leaked.

The first part is with Stalker 2 builds 514 and SDK.
password: NoGods_NoMasters

https://drive.google.com/drive/folders/1_X7kLQrWJ6nu2sWfPjI9pegZ6-6FAk9b

https://drive.google.com/drive/folders/1-pbPZBbvSpZEjF0n6EJiIvbKopvo78MU

Patches for the first part from Becтник “Toгo Caмoгo Cтaлкepa”
Password to archive: xr2_2011_dev

Password for the files in the archive: 321HL56GP30KA9M4JWD0RI0UPA9HZPPJ

https://disk.yandex.ru/d/DtC2cIe2Gbe9yQ

The second part with builds 513 and 524

password: Veni_vidi_vici

https://drive.google.com/drive/u/0/folders/1qeY-1EoVzkU_ezGAJGuxhbBWGdyi2zgk

Third part with the X-Ray 2.0 source code and the rest of the SDK
Password: Aut_Caesar_aut_nihil

https://drive.google.com/uc?id=1YOEcmKNhoAuK2gmjURZaKQhRmrr1C-fY&export=download

Sources:
https://ap-pro.ru/forums/topic/2632-materials-stalker-2-2011/
https://ap-pro.ru/forums/topic/2632-materials-stalker-2-2011/?do=findComment&comment=83916
https://ap-pro.ru/forums/topic/2647-materials-stalker-2-2011-ii/
https://ap-pro.ru/forums/topic/2669-materials-stalker-2-2011-iii/

As you can see, the original Stalker 2 concept would have had a large open world with the actual Chornobyl zone and a lot of areas to visit.

The locations would have had much more detail and were much bigger, imagine if it had all of the forests surrounding the areas and the protagonist had to navigate the giant forests with countless anomalies and other dangers just to get to the Jupiter plant and Yanov. That would be very dangerous. The Stalker zone with all map areas and the other areas in between would be quite big. It is a very long distance from the Cordon to Jupiter for example. And from Dead City to Swamps. The weapons would have been amazing. One weapon was an Ak 15 with a scope and a Night Vision scope in front, allowing it to be a marksman weapon at night. Weapons could be upgraded to have better specifications as well. I do wonder if the SDK could actually be used to make an actual game. Making Stalker 2 2011 and finishing it in 2023 would be an amazing achievement and then we could play the concept and enjoy it.

https://www.securitronlinux.com/arma3/factions-stalker2011.zip All Stalker 2 2011 faction patches. The Niichaz faction is interesting, something to do with mutants.