You're correct, but after PUBG Fortnite appeared and become the dominant Battle Royale game, so it more defines the new genre than PUBG does. Sorry, was a bit of a round-around connection!Fortnite did not stem from Arma, it was the result of an internal competition at Epic Games. You probably mean Playerunknown's Battlegrounds, or PUBG for short. That one was an Arma mod (as was DayZ).