The grenade launcher is a Special Item found in ze_Predator_Ultimate. It belongs to the offensive items and has the ability to damage zombies and ignite them. It has a smaller ignition radius than the explosion of a napalm grenade.
The grenade launcher spawns in the following locations:
To launch a grenade, press 'E' (or the keybind for 'use'). It has a total of 15 uses after which it becomes permanently depleted. Use the ignition of the grenades primarily for slowing down zombies. Unlike standard grenades, these ones don't have knockback and as such will not launch zombies in any direction. Refrain from spamming grenades in short bursts as it's more effective when waiting out the entire duration of each shot.