There are two titanic pillars of the video game industry currently, and you’ve likely heard of at least one of them. “Fortnite,” a battle royale shooter, is effectively the most popular game in the world and it’s not close. The game periodically partners up with massive pop icon entities, and carries enough cultural heft to fetch a $1.5 billion investment from Disney. But “Fortnite” has achieved this mainstream cultural relevance thanks to — like it or not — rock solid gameplay mechanics under the hood. The other pillar, “Roblox” features no such robust gameplay, nor anything approaching the…