https://en.wikipedia.org/wiki/Lethal_League

Lethal League Lethal League is an indie fighting video game developed by Dutch developer Team Reptile. A sequel, Lethal League Blaze, was released in October 2018.

Lethal League is a 2D arena fighting video game in which up to four (but typically two) players face off against each other in an arena. The goal is to hit a ball back and forth and have the ball hit other players until there's only one player left. With each consecutive hit, the ball will speed up more, making it harder for the other players to not get hit and hit the ball back.

See Also

LLB Steam Page
Official LLB Site
LL Steam Page
Official LL Site
Team Reptile
Team Reptile Twitter