Halo 3 introduces a new class of weapons called support weapons. While carrying there, your view switches to third person and you walk slower. You are generally more powerful, but also more vulnerable and much less versatile.
Confirmed Weapons
Speculated Weapons
- Plasma Cannon Seen in Et Tu Brute? ViDoc
- Gravity Hammer Seen in Et Tu Brute? ViDoc
- Flamethrower Seen in Halo 3 beta code.