According to the FAQ... http://wiki.jc-mp.com/Frequently_Asked_Questions3000 people and you can do all the things in SP in MP?
Are there AI / NPCs?
No, and they are very unlikely to be added, at least not in the same sense as singleplayer.
there isnt much to do other than mucking around yet, but thats because the mod developers have concentrated on physically connecting and synchronising people, and have left gamemodes for other people to get working via lua scriptingI'm probably the only person who just doesn't get this game, every time I've played the MP on the days its been on I don't really understand the point, theres no objectives, just spawn, kill, rinse, repeat. Am I missing something obvious?
Loved the SP though.