XCom: Enemy Within
Throwing governs all sorts of thrown weapons, from hand grenades to knives, axes, and spears. Throwing works just like the Shooting skill, and uses all the same modifiers, including those for Range. The Rate of Fire of a thrown attack is 1 per
hand, so a human character could throw two items at once (one with each hand), suffering the usual multi-action and off-hand penalties (see page 85).