Planetside 2 (and maybe the original planetside) is a 1000 player per continent, ~250 player per `battle' shooter. It does it pretty well. By 1000 players per

Planetside 2 (and maybe the original planetside) is a 1000 player per continent, ~250 player per `battle' shooter. It does it pretty well. By 1000 players per continent, I mean they all share a physical space, can walk to eachother etc. By 250 players per battle I mean 250 player fighting inside a structure. All of those players are interacting (gunshots, grenades, vision). At 250 player you start noticing some loading issues that seems to start somewhere around 100 players, but it certainly remains playable.