400 Minutes of /vr/ is a 37-map community megawad for Doom II designed for Boom-compatible source ports by various members of 4chan's retro videogames board, led by MacGuffin and released on the Doomworld forums on May 10, 2022. It is a restriction-based project inspired by the previous 100, 200, and 300 Minutes of /vr/ projects. Mappers were limited to creating maps within 400 minutes of development time, including playtesting. A small number of maps were created in more than 400 minutes, with their creators being allowed extra time for various reasons.

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