Lastfight is based on the French comic Lastman. The comic, running since 2013, is written by Bastien Vives and Balak and illustrated by Bastien Vives and Michael Sanlaville.
Currently Lastman is also running a already successfully funded Kickstarter campaign to produce “26 episodes, more than 5 hours of animation combining fighting, gangsters and supernatural!”. You can find more info on the Kickstarter here.
The game and the show feature the same protagonists and play in the same universe [insert details about how game and show relate to each other here].