Rivals thought kids on Roblox might like a soccer video game with an anime vibe. It sold a few months later for more than $3 million.Most Read from BloombergSinger Akon’s Failed Futuristic City in ...

Roblox has been a blind spot for me for years, but now that I've played it for myself, I totally understand its appeal.

Honorable mentions: The Alters, Battle Train, Bionic Bay, Blade Chimera, Ender Magnolia: Bloom in the Mist, Expelled!, The ...