Template:Level Flags (0.9.9.7)

Level Flags
LF_NOHOMING	Causes homing phase devices to act like normal phase devices.
LF_UNIQUEITEM	Used by the level generation code to keep track of whether a unique item has dropped on the current level (in order to prevent multiple uniques from dropping on one level). This flag also causes a level feeling to occur indicating that a unique item is present.
LF_BONUS	This flag is automatically set for so-called special levels like Halls of Carnage. (It is not set for those special levels like Hellgate that replace normal levels, only by those reached from red stairs.)
LF_SCRIPT	This flag is automatically set for scripted levels, ie levels defined with the level blueprint.
LF_RESPAWN	Causes monsters to randomly respawn as when playing the game on Nightmare!
LF_NORESPAWN	Prevents the Nightmare! respawn feature.
LF_NUKED	This flag is automatically set when the level is nuked.
LF_NONUKE	Causes the thermonuclear bomb to have no effect when it is used. It is not respected by other nuke effects.
LF_ITEMSVISIBLE	Allows the player to see all items on the level (as with a Computer Map).
LF_BEINGSVISIBLE	Allows the player to see all beings on the level (as with a Tracking Map).