16 max (system link) 4 on local
You can play two players on halo 3 with two controllers
2 or more players it has multiplayer option
up to 4 players if u have that many controllers but only on split screen as xbox live stopped
plug in a second controller
Depends on what time of day it is. Halo reach is a pretty old game now so don't a huge amount of players on it.
you can be master chief arbiter: 2 players elites:2-4 players
plug in a second controller
To play with 2 players you need to have 2 controllers. Then you sign the 2 nd player controller in
Up to two players can play in the Co-Op Campaign mode on Halo: Combat Evolved.
not much, about 25?
yes
depending on what time in the day, there can be more than a million players