Supercharge



The soul sphere is a powerup that appears as a floating blue orb with a human face. Picking one up increases the player's health by 100%, up to a maximum of 200%, and the player receives the message "SUPERCHARGE!".

At one point in Doom's development, it was intended for the player to have a limited number of lives. The soul sphere was said to contain a human soul (hence the name and appearance) and collecting it would award an extra life. That behavior made it resemble the "extra life" orb item from Wolfenstein 3D.

Soul spheres are included in the items percentage displayed at the end of each level.

Appearance statistics
The IWADs contain the following numbers of soul spheres:

Doom RPG
In the Doom RPG, the soul sphere gives the player maximum health and maximum armor, similar to the Megasphere in Doom II.