Excelent series! This series is about a guy who likes bad videogames finally challenging a god-tier game with all the gaming skills he acquired while playing sh1tty games. The characters are amazing, MC is a very ENTP guy, basically a moderate Rick Sanchez, he does everything for the lols and is always looking for new challenges to beat. Even though the series is called Shangri-La Frontier, that is the main game of the series, there are several arcs on other games like Berserk Online Passion, Nephilim Hollow and Galaxy Heroes: Chaos (one of the best arcs of the mangá). The point ofthe series is to unravel the story and lore of the world of Shangri-La. The fights are amazing, the characters are amazing (if you just like generic moe or furry clichés you won't like it), almost all of the characters have strong personalities, so no basic shy and dumb characters, everyone is very assertive and aren't very sensitive, they have the type of camaraderie that allows them to mock each other without making drama about it.
If you like the manga you should read the webnovel.