gzdoom-gles/wadsrc/static/mapinfo/doomcommon.txt

skill baby
{
	AmmoFactor = 2
	DamageFactor = 0.5
	EasyBossBrain
	SpawnFilter = Baby
	PicName = "M_JKILL"
	Key = "i"
}

skill easy
{
	EasyBossBrain
	SpawnFilter = Easy
	PicName = "M_ROUGH"
	Key = "h"
}

skill normal
{
	SpawnFilter = Normal
	PicName = "M_HURT"
	Key = "h"
}

skill hard
{
	SpawnFilter = Hard
	PicName = "M_ULTRA"
	Key = "u"
}

skill nightmare
{
	AmmoFactor = 2
	FastMonsters
	DisableCheats
	RespawnTime = 12
	SpawnFilter = Nightmare
	PicName = "M_NMARE"
	MustConfirm
	Key = "n"
}