Halo 3 Beta Video Strategy Guide

The new Proximity Mine is found on Valhalla, atop the bases next to the two Brute Spikers. The mines are especially deadly against vehicles, since they're usually moving too fast to avoid them. On foot, you'll hear the mine beeping well before you step on it, though in the heat of battle you might miss the cue. Mines can be detonated remotely by shooting them, which can serve both offensive and defensive purposes.