The fiasco that got Brian into VGHS. He knocks the grenade The Law placed on his head, dodges the bullet The Law fires, and then blows up the grenade at Law's feet. The expression on Law's face when he realizes something has gone awry in his pub-stomp is priceless.
Ki Swan can make video games on her tablet (albeit simple ones) in the span of a couple minutes. That is all.
Brian, failing to beat The Law at Dance Ex Machina, just basically says "Screw it", turns around, and starts doing disco dancing for the crowd, no longer caring about the game. The Law wins, but Brian becomes the life of the party after that.
It also leads to Jenny inviting Brian to the VGHS team's scrimmage, which is what he's been aiming for this whole time.
Brian finally regaining his self-confidence in Episode 6 and absolutely wrecking Games Dean in a Field of Fire match.
The start of episode 8 suggests that Brian has some truly epic business skills - getting a job as a janitor at a practically-empty 24-7 arcade and, in just under a day, turning into a hugely successful arcade named Brian's that seems to be constantly packed with customers and Brian himself walking the floors like a casino boss (the good kind - the ones without gorilla-like flunkeys).
This is also a reference to Grim Fandango, in Act II where Manny takes over...a casino! The white jacket is even the same!
Ted beating the Duchess of Kart. There's a seeker missile after him. He leads it in a circle, and tricks it into targeting her teammate instead of him. So it hits her teammate, and also causes her to spin out... and hit a banana peel.
Also, props to Brian for his Heroic Sacrifice, keeping Ted in the game long enough to win.
After hours of negotiation, pleading and bribing, Ki finally settles The Law's roommate complaints by punching him in the face.
Episode 4 has Bryan defusing the bomb - which he was previously unable to do - with Cheeto wrapped around his head!
Shot Bot: And now...I'm sorry, Law, but boy loses bot. (charges and launches a Hadoken, shattering the glass and freeing The Law, as The Law lets out a Big "NO!")
While it was short-lived, seeing Brian, Jenny, and the Law working together is an amazing sight. There is no hostility whatsoever between the Law and Brian, and there's even a few times where they seem to be becoming friends. Of course, the Law leaving the school at the end to join a rival school kind of ruins that idea.
The Law gets a lot of moments that episode. First, there's his entrance into the game: he runs up to Jenny and Brian and tells them "Give me thirty seconds." He then gets himself shot and goes through what appears to be some kind of tutorial mode, sharpening his shooting skills before re-entering the arena and using his last bullet to shoot the guy with the light machine gun keeping Brian and Jenny pinned. He then takes the machine gun, hoists it into the air, and screams "FOR SHOT BOT!" Then, of course, there's "I'm a chessmaster, D. I was thinking what you were thinking ten thinks ago. Now get up that hill."
Episode 6 finally has Jenny getting the guts to stand up to her mother and give a withering "The Reason You Suck" Speech. What make is really awesome is that it works.
Episode 6 also features a fight between Ki and competitive fighter champion Ronin. Ki wins the first round with no sweat, but Ronin manages to get the second round. In the last round, Ki ends up getting beaten (but not to the point of losing), but she realizes through a series of flashbacks that she has helped lots of people at VGHS, and shouldn't stop now. Ki regains her power, blocks all of Ronin's blows effortlessly, and finishes her off with an uppercut that turns her into dust.
There was also the race between Ted and DK. As you can probably expect, DK was handing Ted's ass to him. After hearing people taunting him in his head, Ted went through a shortcut and got back on the course in front of DK practically just at the finish line.