I just found out that Battle Bit Remastered exists and it supports 254 simultaneous players per game.
I am wondering how that is even possible. Does anyone know of any details on how they achieved it? Are there any resources for making a networking engine capable of supporting that many players?
Are you mostly interested in the networking aspect? I’m not sure what Battle Bit does but many games employ a prioritization strategy when determining which characters should be updated per state snapshot for a client. Check out an old GDC talk about Halo networking, it’s pretty interesting.
I think this is a written summary of the video: http://blog.wolfire.com/2011/03/GDC-Session-Summary-Halo-networking
This article is also informative: https://www.gafferongames.com/post/state_synchronization/