Halo 3 is a first-person shooter video game developed by Bungie. You can do the campaign mode and follow the story line or play online in a verity of multi player games. Such as...
SLAYER
Kill as many of your opponents as you can. The player with the most points wins.
CAPTURE THE FLAG
Invade your opponent’s stronghold, heist their flag, and bring it back to your base to score.
ODDBALL
Find the ball and hold on to it to earn time. The player with the most time wins.
KING OF THE HILL
Gain control of the hill to earn time. Keep your opponents off and earn the most time to win.
JUGGERNAUT
Work together to take down the Juggernaut. Beware, you kill the Juggernaut, you become the Juggernaut, and only the Juggernaut can win.
TERRITORIES
Find and control the territories on the map. The more territories you control, the faster you earn time.
INFECTION
Destroy the Flood or become infected. Score points for killing flood or big points for infecting a human. The player with the most points wins.
V.I.P.
Protect the V.I.P. from dying at the hands of your opponents. If you are the V.I.P., you must stay alive or your opponents score a point.