Crossposting from DW here (original text by Shiba)
Greetings! The creation of the Innocent crew, Memento Mori 1 and 2 was a success among the Doom community. Its level design and focus on cooperative play (not to mention the soundtrack) are still sources of inspiration to modern mappers. We as well, have been enjoying them a lot, so we began making a sequel, Memento Mori 3.
If you enjoy Doom as much as we do, and would want to create something new and exciting for it, join the cause! Use BOOM format when creating maps. The main Resource pack is on discord, so click the link below if you wanna join. Beginners are accepted but don't make low effort maps. The map list is in a google spreadsheet, it'll be updated with each new contributor. Specific map regulations will be discussed in an MM3 discord server.(Including MIDI lists and such). Also please let us know what map slot(s) you're interested in.
Deadline is 2 months after the last member joins.
The Sadistic Semenary team