While Bell will remain silent throughout the campaign, players will be able to pick various dialog lines that will change the way the missions would play out. The NPC characters will react differently based on the gender (male, female or non-binary). For its main protagonist, Bell, Raven decided to allow the players to create their own character by choosing their name, race, gender and backstory Goyer who was a story consultant on Black Ops and co-wrote Call of Duty: Black Ops II. The campaign was co-written by Murray Kraft, Lead Narrative Designer at Raven Software, and David S. The game is a direct sequel to the original game Call of Duty: Black Ops set in the early 1980s and feature returning characters such as Alex Mason, Frank Woods and Jason Hudson while introducing a new cast of characters including Russell Adler.

The Campaign mode of Black Ops Cold War was designed and developed by Raven Software which was already designing a campaign based on the Cold War before Treyarch took the project over. Nothing is ever as it seems in a gripping single-player Campaign, where players will come face-to-face with historical figures and hard truths, as they battle around the globe through iconic locations like East Berlin, Vietnam, Turkey, Soviet KGB headquarters and more.' - description Campaign ' Black Ops Cold War will drop fans into the depths of the Cold War’s volatile geopolitical battle of the early 1980s. On the next-gen platforms Black Ops Cold War is expected to support 4K resolution and 120 frame-per-second. The game would also showcase volumetric fog.

The technologies included Real Time Lighting which allowed 'the lighting to be adjusted in real time during development' as well as global illumination and ray-tracing. While sharing 'underlying technology' with the revamped engine from Call of Duty: Modern Warfare, Black Ops Cold War used a different iteration of the IW Engine whose tools and technologies were created in 2015 starting with Call of Duty: Black Ops III and rebuilt 'to be scalable and broad to work on future platforms'. The two studios focused on different parts of the game Raven Software designed the Campaign mode while Treyarch developed its Multiplayer and Zombies modes. On August 4, 2020, Activision announced that Treyarch and Raven Software were co-developing the game which would be known as Call of Duty: Black Ops Cold War. In May 2019, it was reported that Treyarch would take over the Call of Duty 2020 project following tensions between Sledgehammer Games and Raven Software during the development of the game.

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