Alternatively, maybe it's part of the game's internal numbering. For example, some games use version numbers like 1.0, 1.1, up to 2.0, etc. If the game is past version 2.x, then 21.1 might be a misinterpretation. However, given the typical versioning, such a high number is unlikely. Instead, it's more plausible that the user made a mistake in the version number. For example, "21.1" might refer to a patch that was released in the first phase of 2021 (hence 21.1) or as a typo for 1.21 or 2.1 or 3.1.
First, I should confirm if the 2020 version is considered Call of Duty: Modern Warfare (with no mention of 4), or if it's still called Call of Duty 4: Modern Warfare. I remember there was a lot of confusion around that. Activision released Call of Duty: Modern Warfare in 2019, and then a 2020 update for it, right? So maybe the user is referring to the 2020 version. Let me check that. Yes, the 2020 version is technically titled "Call of Duty: Modern Warfare" and is part of the 2019-2020 Modern Warfare trilogy. call of duty 4 modern warfare update 21.1
Alternatively, perhaps the user is referring to the 2019 Modern Warfare game's update in 2021. Let's consider the timeline. The 2019 Modern Warfare had its last major update around 2021 with the Warzone Season 3 or something similar. However, I think the 2019 Modern Warfare's support ended in 2020 or 2021. The active game in 2021-2023 would be Modern Warfare II and III, and then the 2022 Modern Warfare. So perhaps the user is mixing up the titles. Alternatively, maybe it's part of the game's internal