Grenade

A grenade is a hand thrown anti-infantry, or anti-vehicle weapon, while some might serve both purposes. They are primed by the user, and then thrown toward the target(s).

UNSC

 * M9 High-Explosive Dual-Purpose grenade - Also known as the Frag grenade. This is the standard UNSC fragmentation grenade.
 * Flashbang grenade - Produces an extremely bright flash of light and a very loud concussion blast when deployed, stunning targets, but doing very little physical damage to them.
 * Sonic grenade - An explosive grenade.
 * Napalm grenade - Causes intense fire when deployed.
 * Stun grenade - Produces an electromagnetic pulse which temporarily immobilizes targets for several seconds.

Covenant

 * Type-1 Antipersonnel Grenade - Also known is the Plasma grenade. Discharges plasma when deployed and can stick to targets.
 * Type-2 Antipersonnel Fragmentation Grenade - Also known as the Spike grenade. When deployed, the grenade fires out sharp super-heated metal projectiles and uses sharp blades to secure itself to surfaces.
 * Type-3 Antipersonnel/Antimaterial Incendiary Grenade - Also known as the Firebomb grenade. Upon impact with a surface, the grenade's contents burn the surrounding area.

Forerunner

 * Z-040 Attenuation Field Generator/Localized - Also known as the Pulse grenade. Upon being thrown, it forcefully detonates and forms a hazardous ionization sphere which eventually collapses, destroying nearby targets.