After completing the two episodes in the game, make sure you've combined all of the below elements together:
Fire + Water = Steam
Fire + Earth = Lava
Fire + Grass = Tobacco
Fire + House = Ash
Fire + Air = Energy
Fire + Weapon = Flamethrower
Fire + Witch = Heavens
Fire + Radio-Wave = Laser
Fire + Oil = Napalm
Fire + Pigeon = Phoenix
Fire + Energy = Plasma
Fire + House = Suffering
Fire + Woman = Corpse + Suffering
Fire + Tree = Ash
Fire + Tobacco = Diseases
Fire + Soul = Inferno
Fire + Man = Corpse + Suffering
Fire + Human = Corpse + Suffering
Fire + Death = Inferno
Fire + Crow = Phoenix
Fire + Cthulhu = Wrath
Fire + Corpse = Ash
Fire + Book = Ash
Fire + Beast = Ash