From Quake Wiki
Commonly used to spam lower sections of a map in multiplayer deathmatch, the Grenade Launcher shoots... you guessed it - a grenade at an arch, it explodes either after 2.5 seconds of bouncing or lying around, or instantly if coming in contact with a player or monster while airborne. The explosion gives off quite a damaging blast radius.
The Shambler takes half damage from the grenade launcher.
|Weapons from Quake|
|Axe | Shotgun | Double-Barrelled Shotgun | Nailgun | Super Nailgun | Grenade Launcher | Rocket Launcher | Thunderbolt|