512 Linedefs of /vr/ is a 32-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 June 28, 2022. It is a restriction-based project inspired by similar /vr/ projects (such as 200 Minutes of /vr/ and 2048 Units of /vr/). Mappers were limited to creating maps with no more than 512 linedefs.