Spike Grenade

The Spike Grenade is a new weapon that will be introduced in Halo 3. It is an invention of the Brutes; their solution to the Plasma Grenade. When it detonates, it shoots a conical blast of spikes in one direction (kind of like a claymore mine). Unlike the Plasma Grenade, the Spike Grenade sticks to the surface of ANYTHING it lands on (the plasma grenade can only stick to enemies and vehicles). Also, The idea of a grenade that shoots spikes used by the Brutes can be thought of as a combination of the Frag Grenade and the Plasma Grenade, since it uses a small ballistic explosion to propel spikes (a property of the Frag) while sticking to any item it comes in contact with (a property of the Plasma).

According to EGM reports, the grenade makes a distinct "Whoop-whoop-whoop" sound when thrown, which may be useful for scaring enemies or, to a more experienced player, could be used to find the thrower's position.

The Spike Grenade appears to be similar in shape to the Stielhandgranate the Germans used in WW2. It has four big curved spikes on top of the grenade, and a number of smaller ones around the shaft of the grenade. This also gives it the appearance of a medieval mace.

In result of the addition of new grenades, as well as to help balance the game, the game developers plan on reducing the maximum number of grenades to two per type, bringing the total to 6 grenades.