Is there multiplayer support planned for this project?
The developer would have to rewrite nearly everything and could take a year or more for that with no other updates or patches. Even then, multiplayer increases the chance of this project being taken down. A community member with the source codes can try, but it’s best of luck to them to dedicate themselves toward such a task.
Also that question has been asked so many times, that if the developer could do reworks for each mechanic separately (i.e. weapons, movement, etc. that leans towards netcode multiplayer stuff) and spend two months for each of those reworks, then maybe it could happen in a span of two years from now, but still… a huge rework that could ultimately lead to the year-or-more-no-updates issue.