The Flame Mask is a puzzle item in Hexen. It is a grey mask with red eyes, horns, and a long moustache. This item is found on the map Guardian of Fire and is used on the map Guardian of Ice. When it is placed in the correct spot, it causes lava to appear which melts a block of ice and makes the Fire Key accessible. This is a scripted effect, so the Flame Mask may have different effects in add-on levels.

In Deathkings of the Dark Citadel mission pack the Flame mask is used on two levels in the first hub to complete certain puzzles.