Rocket

The rocket is a brown missile the player may pick up to use as ammo for the rocket launcher. Normally a single rocket, it becomes two at the I'm Too Young To Die and Nightmare! skill levels.

A direct hit from a rocket inflicts a range of 20 to 160 hit points of damage (determined using Doom's pseudorandom number generator); the explosion may also cause additional blast damage. Rockets fired by cyberdemons do the same amount of damage as those from the player, blast damage included.

Data
In classic Doom, single-rocket pickups are first encountered on these levels:

The IWADs contain the following numbers of single-rocket pickups:

Doom RPG
The rocket appears in Doom RPG, with a somewhat different sprite. It gives the player either 1 or 4 rockets.