The Ghoul's Forest (series)

The Ghoul's Forest is a series of PWADs for ZDoom made by Cutmanmike.

There are three WADs in the series; each one takes place in a large, dark forest, with one or more "ghouls" inside. The "ghouls" are fast-moving, usually instantly-killing monsters with a disturbing appearance. The point of each WAD is to kill the ghouls before they kill the player.

The WADs are considered to be one of the scariest ever made, evoking feelings of terror.