Halo 3: ODST brings back Halo's legendary multiplayer mode in a new and exciting way with its introduction to free-to-play gaming. This move allows more players than ever before title has seen access while also offering something fresh every time you log-in through seasonal updates that bring about unique events, brand-new maps & modes alongside community-driven content.

The game features two primary types of multiplayer: Arena and co-op play:

1) Arena mode is a return to the classic Halo experience with several key changes designed specifically for competitive gameplay. These include fair starts where all players start at equal ground without any advantages given due partially because there will be no respawning once you die; on-map equipment has also been implemented so instead of having access via purchasing items from shops within maps themselves - each map now comes equipped with its own set pieces like grappling hooks or deployable turrets etcetera.

2) Co-op is available in Halo 3: ODST, allowing up to four players to team up and take on the campaign together. Players can either play locally using split-screen mode if they have multiple Xboxes, or online via Xbox Live or system link for a more competitive experience with friends anywhere around the world.

For those who enjoy playing co-op missions alongside their buddies but prefer something slightly different than just standard multiplayer modes available within Halo 3 ODST also offers an interesting twist - called 'Mombasa Streets' where one player controls The Rookie while others take control of three other identical UNSC Orbital Drop Shock Troopers (ODSTs).

Halo 1 4 player co op