Grenade Launcher

The Grenade Launcher is the fourth ranged weapon obtained in BioShock. It is located in Neptune's Bounty.

It fires grenades that do high damage and have a wide splash damage radius. They are fired at an arc, making targeting at long range require some estimation. Its main weaknesses are a low ammo cartridge capacity, a slow rate of fire, and the potential for collateral damage. However, the damage can be increased and immunity to collateral damage can be gained with upgrades at a Power to the People station, further increasing the usefulness of the Grenade Launcher. There is no hit location damage bonus when using this weapon; the same amount of damage is done no matter where the target is hit.

Power to the People Upgrades
Immunity to Splash Damage :

This upgrade grants immunity to splash damage from the player's own grenades.

Damage Increase :

This upgrade increases the Grenade Launcher's damage by 25%.

Ammunition Types
Frag Grenades :

The Grenade Launcher's frag grenades do high damage with a large explosive radius, and are effective against all targets. They will bounce off objects and surfaces, and explode after a short delayed fuse or on impact with an enemy. Frag grenades can be bought and found in abundance, furthering increasing their versatile use.

Proximity Mines :

The Grenade Launcher's proximity mines do high damage with a large explosive radius, and are effective against all targets. They adhere to objects and surfaces, and explode when an enemy is in close proximity. Proximity mines can be bought and found in limited quantities.

Heat-seeking RPG's :

The Grenade Launcher's Heat-seeking RPG's do high damage with a large explosive radius, and are effective against all targets. They will seek enemies when fired and explode on impact. Heat-seeking RPG's can be found and manufactured in limited quantities.

Trivia

 * The frag grenades, as well as the weapon itself, look to be constructed almost entirely of common household and industrial items