What type of video game is the one for which the man known as Radiation is best known?  
Toby Fox: Toby Fox (born October 11, 1991), also known as Radiation, is an American video game developer and composer. Toby Fox:  He is best known for developing the critically acclaimed video game "Undertale" in 2015. Undertale: Undertale is a role-playing video game created by American indie developer and composer Toby Fox.
i don't know