Geyser is a weapon that appears in Zone of the Enders, The 2nd Runner, and The Fist of Mars. In Zone of Enders and The 2nd Runner, when the weapon is used, a cluster of grenade-like weapons are thrown out. These grenades cause minor damage to and stun enemies that are hit. After hitting another solid object, the weapons each emit a "geyser" of energy which can further damage and stun enemies. The spread of the grenades can also be controlled depending upon the amount of pressure put on the circle button.