The unnamed virtual reality fighting game as seen in Episode 2.
There is an Unknown Fighting Class featured in Video Game High School. It is only shown in Episode 6, the next day after BrianD gets brutally beaten at the FPS scrimmage.
The unknown fighting class utilizes a fighting game (possibly known as Laceration 4, as mentioned in S2E6) seen through out the series and is taught by an unknown teacher.
In Season 2, Episode 6, Ki plays a variation of the game, called Laceration 4, against a competitive fighter champion, Ronin. Ronin temporarily believes that Ki is the tacoboy14, a gamer against whom Ronin holds a grudge. Ki ends up defeating her in an intense fighting match. While it may be a different game, it has similar mechanics to the one shown throughout the series.