Found this online, couldn’t find it on the forums so here goes…
http://muchdifferent.com/1000PlayerFPS/
Are running a massive player vs player deathmatch using the Unity game engine, they aim to have 1000 players fighting all at once.
Sunday Jan 29th, Time Zone depending check their site out for details.
Looks like a lot of fun 
Cool, thanks for posting this: I’ll definitely try to participate 
must have access to one kick ass server
Actually it looks like they have 8 single-threaded kick-ass servers
It depends on the network protocol and what data they are transmiting. 1000 people for FPS are not big problem (no special AI, low numbers of NPCs), especialy if you sent some not important data p2p. Our server is able to handle 32k + NPCs without any problem.
For example even old MMO on TCP/IP is generating cca 2Mbit per 100 players. Nothing.
If were designing such project, I would send graphic sync and other not important information p2p and use server only for critical arbitration. It is even possible to use distributed arbitration for movement (it typically eats majority of resources).This could lower HW and bandwidth needs 10 - 100x. Generally I dont see any technical issue from network point of view.
Of course if they decide to “bruteforce” it without ptp optmizations, some UDP and distributed arbitration, they can have traffic hundreds of Mb/sec and need for lots of cores.
Far more interesting is displaying 1000 players at once. This is reason, why player models are same, everybody likes batching.
Anyway really nice event.
@Demostenes: I have to note that you made your 1000th post while writing about this 1000 player FPS: impressive.
LOl nice catch
Sounds great but I’m sorry 23 Euro’s to play in a one time FPS match is a bit excessive. Although I appreciate the fact its going to charity.
As neat as 1000 player battle is (not knocking it, its a hell of an achievement if it works), eve-online’s space-battles have been significantly larger than that, so no its not going to be setting any records I’m afraid.
Biggest I was in was at least 2500 ships. Giant frigging lag fest with the server shitting itself multiple times, but by lord it was epic.
Its not a FPS though is it?
It is free. The 23 Euro is a exclusive ticket.
Oh sorry I misread that.
Cant wait to run around all laggy because I am connecting from China hrhrhr. 500ms? No biggie…
There’s an official thread about that now:
http://forum.unity3d.com/threads/119957-Our-world-record-FPSMMO-is-on-the-29th-of-January!
This looks pretty cool.