Over the past two years, the community-based game/development platform Roblox has exploded. While it might sound like a confusing concept, the platform is immensely popular, attracting 64 million monthly users according to Business Insider. The program acts as both development platform and game, allowing players to boot up millions of user-made projects or create their own games and immediately publish them. Developers are even able to sell items and upgrades in their games and in 2017 Roblox paid $30 million to their many user-developers. To read more about the popular game click here or the image above.