Lethal League (Steam key/Region free).

http://store.steampowered.com/app/261180/
Lethal League is a competitive projectile fighting game where you have to hit an anti-gravity ball into the face of your opponent to win. The ball speeds up with every strike, up to explosively extreme velocities. Play intense local matches with friends and foes, challenge yourself in the singleplayer mode or battle it out online.

Key Features

Up to 4 players:
Play locally AND online with up to 4 players in free-for-all and team modes.
High performance online GGPO multiplayer:
In the online mode, invite friends for a Private Match or head into a Quick Match. Using the proven GGPO technology, the high speed nature of Lethal League translates seamlessly to online play and provides a way to tweak your online experience.
Easy to pick up, hard to master gameplay:
Start off simply hitting the ball faster and faster. Improve by learning how to use Smashing, Bunting, Parrying and Special Abilities to your advantage.
Street-styled characters:
From the mad Candyman to the cyborg crocodile Latch, every character has their own unique play-style and abilities.
Singleplayer challenge mode:
Step up to the plate by yourself and beat a series of opponents arcade-style to reach the beat-blasting bossfight.
Banging beats:
A Big-beat, Hip-Hop and House soundtrack featuring the likes of Grillo, Bignic, Dr. Lazer and more.
No weak shit.